diff --git a/libfprint/drivers/aes1610.c b/libfprint/drivers/aes1610.c
index 56617530..50bc4834 100644
--- a/libfprint/drivers/aes1610.c
+++ b/libfprint/drivers/aes1610.c
@@ -811,7 +811,7 @@ static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
 
 	r = libusb_claim_interface(dev->udev, 0);
 	if (r < 0) {
-		fp_err("could not claim interface 0");
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
 		return r;
 	}
 
diff --git a/libfprint/drivers/aes1660.c b/libfprint/drivers/aes1660.c
index 8e63fe38..32bea4eb 100644
--- a/libfprint/drivers/aes1660.c
+++ b/libfprint/drivers/aes1660.c
@@ -53,7 +53,7 @@ static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
 
 	r = libusb_claim_interface(dev->udev, 0);
 	if (r < 0) {
-		fp_err("could not claim interface 0");
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
 		return r;
 	}
 
diff --git a/libfprint/drivers/aes2501.c b/libfprint/drivers/aes2501.c
index 6c852a51..f6e3edf4 100644
--- a/libfprint/drivers/aes2501.c
+++ b/libfprint/drivers/aes2501.c
@@ -850,7 +850,7 @@ static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
 
 	r = libusb_claim_interface(dev->udev, 0);
 	if (r < 0) {
-		fp_err("could not claim interface 0");
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
 		return r;
 	}
 
diff --git a/libfprint/drivers/aes2550.c b/libfprint/drivers/aes2550.c
index 965bdb07..387967ee 100644
--- a/libfprint/drivers/aes2550.c
+++ b/libfprint/drivers/aes2550.c
@@ -622,7 +622,7 @@ static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
 
 	r = libusb_claim_interface(dev->udev, 0);
 	if (r < 0) {
-		fp_err("could not claim interface 0");
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
 		return r;
 	}
 
diff --git a/libfprint/drivers/aes2660.c b/libfprint/drivers/aes2660.c
index 7cae59c9..efe9670a 100644
--- a/libfprint/drivers/aes2660.c
+++ b/libfprint/drivers/aes2660.c
@@ -53,7 +53,7 @@ static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
 
 	r = libusb_claim_interface(dev->udev, 0);
 	if (r < 0) {
-		fp_err("could not claim interface 0");
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
 		return r;
 	}
 
diff --git a/libfprint/drivers/aes3500.c b/libfprint/drivers/aes3500.c
index 6f4d6b07..05c204a3 100644
--- a/libfprint/drivers/aes3500.c
+++ b/libfprint/drivers/aes3500.c
@@ -131,7 +131,7 @@ static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
 
 	r = libusb_claim_interface(dev->udev, 0);
 	if (r < 0)
-		fp_err("could not claim interface 0");
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
 
 	aesdev = dev->priv = g_malloc0(sizeof(struct aes3k_dev));
 
diff --git a/libfprint/drivers/aes4000.c b/libfprint/drivers/aes4000.c
index b8496514..f1a9d061 100644
--- a/libfprint/drivers/aes4000.c
+++ b/libfprint/drivers/aes4000.c
@@ -128,7 +128,7 @@ static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
 
 	r = libusb_claim_interface(dev->udev, 0);
 	if (r < 0)
-		fp_err("could not claim interface 0");
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
 
 	aesdev = dev->priv = g_malloc0(sizeof(struct aes3k_dev));
 
diff --git a/libfprint/drivers/etes603.c b/libfprint/drivers/etes603.c
index aae0f0f4..44cacbcb 100644
--- a/libfprint/drivers/etes603.c
+++ b/libfprint/drivers/etes603.c
@@ -1465,8 +1465,7 @@ static int dev_open(struct fp_img_dev *idev, unsigned long driver_data)
 
 	ret = libusb_claim_interface(idev->udev, 0);
 	if (ret != LIBUSB_SUCCESS) {
-		fp_err("libusb_claim_interface failed on interface 0 "
-		       "(err=%d)", ret);
+		fp_err("libusb_claim_interface failed on interface 0: %s", libusb_error_name(r));
 		return ret;
 	}
 
diff --git a/libfprint/drivers/fdu2000.c b/libfprint/drivers/fdu2000.c
index ebd71031..e14b860e 100644
--- a/libfprint/drivers/fdu2000.c
+++ b/libfprint/drivers/fdu2000.c
@@ -264,8 +264,10 @@ gint dev_init(struct fp_img_dev *dev, unsigned long driver_data)
 	//if ( (r = usb_set_configuration(dev->udev, 1)) < 0 )
 	//	goto out;
 
-	if ( (r = libusb_claim_interface(dev->udev, 0)) < 0 )
-		goto out;
+	if ( (r = libusb_claim_interface(dev->udev, 0)) < 0 ) {
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
+		return r;
+	}
 
 	//if ( (r = usb_set_altinterface(dev->udev, 1)) < 0 )
 	//	goto out;
diff --git a/libfprint/drivers/upeke2.c b/libfprint/drivers/upeke2.c
index f6852058..3f05e809 100644
--- a/libfprint/drivers/upeke2.c
+++ b/libfprint/drivers/upeke2.c
@@ -864,8 +864,10 @@ static int dev_init(struct fp_dev *dev, unsigned long driver_data)
 	int r;
 
 	r = libusb_claim_interface(dev->udev, 0);
-	if (r < 0)
+	if (r < 0) {
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
 		return r;
+	}
 
 	upekdev = g_malloc(sizeof(*upekdev));
 	upekdev->seq = 0xf0; /* incremented to 0x00 before first cmd */
diff --git a/libfprint/drivers/upeksonly.c b/libfprint/drivers/upeksonly.c
index 22ada5e2..5048a5c7 100644
--- a/libfprint/drivers/upeksonly.c
+++ b/libfprint/drivers/upeksonly.c
@@ -1359,7 +1359,7 @@ static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
 
 	r = libusb_claim_interface(dev->udev, 0);
 	if (r < 0) {
-		fp_err("could not claim interface 0");
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
 		return r;
 	}
 
diff --git a/libfprint/drivers/upektc.c b/libfprint/drivers/upektc.c
index 271cffb7..f3d9b8ab 100644
--- a/libfprint/drivers/upektc.c
+++ b/libfprint/drivers/upektc.c
@@ -441,7 +441,7 @@ static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
 
 	r = libusb_claim_interface(dev->udev, 0);
 	if (r < 0) {
-		fp_err("could not claim interface 0");
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
 		return r;
 	}
 
diff --git a/libfprint/drivers/upektc_img.c b/libfprint/drivers/upektc_img.c
index 31eddff0..18e271b6 100644
--- a/libfprint/drivers/upektc_img.c
+++ b/libfprint/drivers/upektc_img.c
@@ -651,7 +651,7 @@ static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
 
 	r = libusb_claim_interface(dev->udev, 0);
 	if (r < 0) {
-		fp_err("could not claim interface 0");
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
 		return r;
 	}
 
diff --git a/libfprint/drivers/upekts.c b/libfprint/drivers/upekts.c
index c191a2dd..b2971276 100644
--- a/libfprint/drivers/upekts.c
+++ b/libfprint/drivers/upekts.c
@@ -875,8 +875,10 @@ static int dev_init(struct fp_dev *dev, unsigned long driver_data)
 	int r;
 
 	r = libusb_claim_interface(dev->udev, 0);
-	if (r < 0)
+	if (r < 0) {
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
 		return r;
+	}
 
 	upekdev = g_malloc(sizeof(*upekdev));
 	upekdev->seq = 0xf0; /* incremented to 0x00 before first cmd */
diff --git a/libfprint/drivers/uru4000.c b/libfprint/drivers/uru4000.c
index ccaa87f8..462b86ac 100644
--- a/libfprint/drivers/uru4000.c
+++ b/libfprint/drivers/uru4000.c
@@ -1285,7 +1285,7 @@ static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
 
 	r = libusb_claim_interface(dev->udev, iface_desc->bInterfaceNumber);
 	if (r < 0) {
-		fp_err("interface claim failed");
+		fp_err("interface claim failed: %s", libusb_error_name(r));
 		goto out;
 	}
 
diff --git a/libfprint/drivers/vcom5s.c b/libfprint/drivers/vcom5s.c
index 4b442b23..1f127a8c 100644
--- a/libfprint/drivers/vcom5s.c
+++ b/libfprint/drivers/vcom5s.c
@@ -348,7 +348,7 @@ static int dev_init(struct fp_img_dev *dev, unsigned long driver_data)
 
 	r = libusb_claim_interface(dev->udev, 0);
 	if (r < 0)
-		fp_err("could not claim interface 0");
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
 
 	if (r == 0)
 		fpi_imgdev_open_complete(dev, 0);
diff --git a/libfprint/drivers/vfs101.c b/libfprint/drivers/vfs101.c
index 062bc426..3ee13e3b 100644
--- a/libfprint/drivers/vfs101.c
+++ b/libfprint/drivers/vfs101.c
@@ -1504,7 +1504,7 @@ static int dev_open(struct fp_img_dev *dev, unsigned long driver_data)
 	if (r < 0)
 	{
 		/* Interface not claimed, return error */
-		fp_err("could not claim interface 0");
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
 		return r;
 	}
 
diff --git a/libfprint/drivers/vfs301.c b/libfprint/drivers/vfs301.c
index 04db05ec..833c05b0 100644
--- a/libfprint/drivers/vfs301.c
+++ b/libfprint/drivers/vfs301.c
@@ -240,7 +240,7 @@ static int dev_open(struct fp_img_dev *dev, unsigned long driver_data)
 	r = libusb_claim_interface(dev->udev, 0);
 	if (r < 0) {
 		/* Interface not claimed, return error */
-		fp_err("could not claim interface 0");
+		fp_err("could not claim interface 0: %s", libusb_error_name(r));
 		return r;
 	}
 
diff --git a/libfprint/drivers/vfs5011.c b/libfprint/drivers/vfs5011.c
index efa3df23..fa1dcabc 100644
--- a/libfprint/drivers/vfs5011.c
+++ b/libfprint/drivers/vfs5011.c
@@ -849,7 +849,7 @@ static int dev_open(struct fp_img_dev *dev, unsigned long driver_data)
 
 	r = libusb_claim_interface(dev->udev, 0);
 	if (r != 0) {
-		fp_err("Failed to claim interface");
+		fp_err("Failed to claim interface: %s", libusb_error_name(r));
 		return r;
 	}