diff --git a/libavfilter/framequeue.h b/libavfilter/framequeue.h
index 558ea22223..f5ef744638 100644
--- a/libavfilter/framequeue.h
+++ b/libavfilter/framequeue.h
@@ -44,6 +44,7 @@ typedef struct FFFrameBucket {
  * It is currently empty.
  */
 typedef struct FFFrameQueueGlobal {
+    char dummy; /* C does not allow empty structs */
 } FFFrameQueueGlobal;
 
 /**