diff --git a/libavfilter/vf_crop.c b/libavfilter/vf_crop.c
index 6b1592836e..e2b9bc39b4 100644
--- a/libavfilter/vf_crop.c
+++ b/libavfilter/vf_crop.c
@@ -37,7 +37,7 @@ typedef struct {
 
 static int query_formats(AVFilterContext *ctx)
 {
-    enum PixelFormat pix_fmts[] = {
+    static const enum PixelFormat pix_fmts[] = {
         PIX_FMT_RGB48BE,      PIX_FMT_RGB48LE,
         PIX_FMT_ARGB,         PIX_FMT_RGBA,
         PIX_FMT_ABGR,         PIX_FMT_BGRA,