diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index b95b419955..00434c9114 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -720,11 +720,12 @@ void avcodec_get_frame_defaults(AVFrame *frame)
 
 AVFrame *avcodec_alloc_frame(void)
 {
-    AVFrame *frame = av_mallocz(sizeof(AVFrame));
+    AVFrame *frame = av_malloc(sizeof(AVFrame));
 
     if (frame == NULL)
         return NULL;
 
+    frame->extended_data = NULL;
     avcodec_get_frame_defaults(frame);
 
     return frame;