diff --git a/libfprint/fpi-device.c b/libfprint/fpi-device.c
index af775542..c9157eb3 100644
--- a/libfprint/fpi-device.c
+++ b/libfprint/fpi-device.c
@@ -21,6 +21,7 @@
 #define FP_COMPONENT "device"
 #include <math.h>
 #include <fcntl.h>
+#include <errno.h>
 
 #include "fpi-log.h"