diff --git a/dlls/winex11.drv/mouse.c b/dlls/winex11.drv/mouse.c
index ab500eff428..1a2d618dc6f 100644
--- a/dlls/winex11.drv/mouse.c
+++ b/dlls/winex11.drv/mouse.c
@@ -295,7 +295,7 @@ static XcursorImage *create_xcursor_frame( HDC hdc, const ICONINFOEXW *iinfo, HA
 {
     XcursorImage *image, *ret = NULL;
     DWORD delay_jiffies, num_steps;
-    int x, y, i, has_alpha;
+    int x, y, i, has_alpha = FALSE;
     XcursorPixel *ptr;
 
     wine_tsx11_lock();