wine-wmclass.patch


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diff --git a/dlls/winex11.drv/window.c b/dlls/winex11.drv/window.c
index 221f4392aa9..5485eb0f8e8 100644
--- a/dlls/winex11.drv/window.c
+++ b/dlls/winex11.drv/window.c
@@ -1034,8 +1034,17 @@ static void set_initial_wm_hints( Display *display, Window window )
     /* class hints */
     if ((class_hints = XAllocClassHint()))
     {
-        class_hints->res_name = process_name;
-        class_hints->res_class = process_name;
+        const char *wine_wmclass = getenv("WINE_WMCLASS");
+        char window_class[128];
+
+        if (wine_wmclass && *wine_wmclass){
+            snprintf(window_class, sizeof(window_class), "%s", wine_wmclass);
+            class_hints->res_name = window_class;
+            class_hints->res_class = window_class;
+        } else {
+            class_hints->res_name = process_name;
+            class_hints->res_class = process_name;
+        }
         XSetClassHint( display, window, class_hints );
         XFree( class_hints );
     }