diff --git a/libavcodec/acelp_math.h b/libavcodec/acelp_math.h
index ffc70c4ce5..cab957e292 100644
--- a/libavcodec/acelp_math.h
+++ b/libavcodec/acelp_math.h
@@ -72,4 +72,4 @@ static int sum_of_squares(const int16_t* speech, int length, int offset, int shi
     return sum;
 }
 
-#endif // FFMPEG_ACELP_MATH_H
+#endif /* FFMPEG_ACELP_MATH_H */