diff --git a/libavfilter/buffersrc.h b/libavfilter/buffersrc.h
index 0652113f2b..08fbd18a47 100644
--- a/libavfilter/buffersrc.h
+++ b/libavfilter/buffersrc.h
@@ -106,7 +106,7 @@ typedef struct AVBufferSrcParameters {
     AVBufferRef *hw_frames_ctx;
 
     /**
-     * Audio only, the audio sampling rate in samples per secon.
+     * Audio only, the audio sampling rate in samples per second.
      */
     int sample_rate;