diff --git a/libavformat/avisynth.c b/libavformat/avisynth.c
index fb7441c6c7..a2f0550a3f 100644
--- a/libavformat/avisynth.c
+++ b/libavformat/avisynth.c
@@ -140,15 +140,15 @@ static av_cold int avisynth_load_library(void)
     LOAD_AVS_FUNC(avs_release_video_frame, 0);
     LOAD_AVS_FUNC(avs_take_clip, 0);
 #ifdef USING_AVISYNTH
-    LOAD_AVS_FUNC(avs_bits_per_pixel, 0);
-    LOAD_AVS_FUNC(avs_get_height_p, 0);
-    LOAD_AVS_FUNC(avs_get_pitch_p, 0);
-    LOAD_AVS_FUNC(avs_get_read_ptr_p, 0);
-    LOAD_AVS_FUNC(avs_get_row_size_p, 0);
-    LOAD_AVS_FUNC(avs_is_yv24, 0);
-    LOAD_AVS_FUNC(avs_is_yv16, 0);
-    LOAD_AVS_FUNC(avs_is_yv411, 0);
-    LOAD_AVS_FUNC(avs_is_y8, 0);
+    LOAD_AVS_FUNC(avs_bits_per_pixel, 1);
+    LOAD_AVS_FUNC(avs_get_height_p, 1);
+    LOAD_AVS_FUNC(avs_get_pitch_p, 1);
+    LOAD_AVS_FUNC(avs_get_read_ptr_p, 1);
+    LOAD_AVS_FUNC(avs_get_row_size_p, 1);
+    LOAD_AVS_FUNC(avs_is_yv24, 1);
+    LOAD_AVS_FUNC(avs_is_yv16, 1);
+    LOAD_AVS_FUNC(avs_is_yv411, 1);
+    LOAD_AVS_FUNC(avs_is_y8, 1);
 #endif
 #undef LOAD_AVS_FUNC