diff --git a/libavcodec/smc.c b/libavcodec/smc.c
index a423c455cc..3adf6c899c 100644
--- a/libavcodec/smc.c
+++ b/libavcodec/smc.c
@@ -92,7 +92,7 @@ static void smc_decode_stream(SmcContext *s)
     unsigned int color_flags_b;
     unsigned int flag_mask;
 
-    unsigned char *pixels = s->frame->data[0];
+    unsigned char * const pixels = s->frame->data[0];
 
     int image_size = height * s->frame->linesize[0];
     int row_ptr = 0;