diff --git a/libfprint/drivers/aes2501.c b/libfprint/drivers/aes2501.c
index 450ac6e0..53d3bb5e 100644
--- a/libfprint/drivers/aes2501.c
+++ b/libfprint/drivers/aes2501.c
@@ -213,9 +213,8 @@ sum_histogram_values (unsigned char *data, guint8 threshold)
   if (threshold > 0x0f)
     return -1;
 
-  /* FIXME endianness */
   for (i = threshold; i < 16; i++)
-    r += histogram[i];
+    r += GUINT16_FROM_LE (histogram[i]);
 
   return r;
 }
diff --git a/meson.build b/meson.build
index db3d75ab..11b096b4 100644
--- a/meson.build
+++ b/meson.build
@@ -119,7 +119,7 @@ drivers_info = {
     'aes1610': { 'helper': ['aeslib'] },
     'aes1660': { 'helper': ['aeslib', 'aesx660'] },
     'aes2660': { 'helper': ['aeslib', 'aesx660'] },
-    'aes2501': { 'helper': ['aeslib'], 'endian_dependent': true },
+    'aes2501': { 'helper': ['aeslib'] },
     'aes2550': { 'helper': ['aeslib'] },
     'vfs101': {},
     'vfs301': { 'endian_dependent': true },
diff --git a/tests/meson.build b/tests/meson.build
index 71ede6ce..68f1aab3 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -34,7 +34,7 @@ installed_tests_testdir = datadir / 'installed-tests' / versioned_libname
 installed_tests_libdir = libdir
 
 drivers_tests = {
-    'aes2501': {},
+    'aes2501': { 'timeout': 20 },
     'aes3500': {},
     'elan': {},
     'elan-cobo': {},