diff --git a/libavdevice/x11grab.c b/libavdevice/x11grab.c
index 524bdd15db..ff37d762a6 100644
--- a/libavdevice/x11grab.c
+++ b/libavdevice/x11grab.c
@@ -85,7 +85,7 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
     struct x11_grab *x11grab = s1->priv_data;
     Display *dpy;
     AVStream *st = NULL;
-    int input_pixfmt;
+    enum PixelFormat input_pixfmt;
     XImage *image;
     int x_off = 0;
     int y_off = 0;