diff --git a/libavutil/fifo.h b/libavutil/fifo.h
index eb36af42a8..79cd233088 100644
--- a/libavutil/fifo.h
+++ b/libavutil/fifo.h
@@ -35,7 +35,7 @@ typedef struct AVFifoBuffer {
 /**
  * Initializes an AVFifoBuffer.
  * @param size of FIFO
- * @return AVFifoBuffer or NULL if mem allocation failure
+ * @return AVFifoBuffer or NULL in case of memory allocation failure
  */
 AVFifoBuffer *av_fifo_alloc(unsigned int size);