diff --git a/libswscale/rgb2rgb_template.c b/libswscale/rgb2rgb_template.c
index d7c581b44c..c9a16e2512 100644
--- a/libswscale/rgb2rgb_template.c
+++ b/libswscale/rgb2rgb_template.c
@@ -2429,7 +2429,7 @@ static inline void RENAME(rgb24toyv12)(const uint8_t *src, uint8_t *ydst, uint8_
     }
 }
 
-void RENAME(interleaveBytes)(uint8_t *src1, uint8_t *src2, uint8_t *dest,
+static void RENAME(interleaveBytes)(uint8_t *src1, uint8_t *src2, uint8_t *dest,
                              long width, long height, long src1Stride,
                              long src2Stride, long dstStride){
     long h;