diff --git a/src/devices/wifi/tests/test-wifi-ap-utils.c b/src/devices/wifi/tests/test-wifi-ap-utils.c
index a5dc545b64..26e130c47d 100644
--- a/src/devices/wifi/tests/test-wifi-ap-utils.c
+++ b/src/devices/wifi/tests/test-wifi-ap-utils.c
@@ -1442,7 +1442,7 @@ main (int argc, char **argv)
 	                      test_ap_wpa_eap_connection_5);
 
 #define ADD_FUNC(func) do { \
-		gchar *name_idx = g_strdup_printf ("/wifi/wpa_psk/" G_STRINGIFY (func) "/%ld", i); \
+		gchar *name_idx = g_strdup_printf ("/wifi/wpa_psk/" G_STRINGIFY (func) "/%zd", i); \
 		g_test_add_data_func (name_idx, (gconstpointer) i, func); \
 		g_free (name_idx); \
 	} while (0)
@@ -1467,7 +1467,7 @@ main (int argc, char **argv)
 
 #undef ADD_FUNC
 #define ADD_FUNC(func) do { \
-		gchar *name_idx = g_strdup_printf ("/wifi/rsn_psk/" G_STRINGIFY (func) "/%ld", i); \
+		gchar *name_idx = g_strdup_printf ("/wifi/rsn_psk/" G_STRINGIFY (func) "/%zd", i); \
 		g_test_add_data_func (name_idx, (gconstpointer) i, func); \
 		g_free (name_idx); \
 	} while (0)