diff --git a/dlls/winex11.drv/dllmain.c b/dlls/winex11.drv/dllmain.c
index 7ea07647dc9..705503dc37c 100644
--- a/dlls/winex11.drv/dllmain.c
+++ b/dlls/winex11.drv/dllmain.c
@@ -127,6 +127,30 @@ static NTSTATUS x11drv_clipboard_init( UINT arg )
 }
 
 
+static NTSTATUS WINAPI x11drv_is_system_module( void *arg, ULONG size )
+{
+    HMODULE module;
+    unsigned int i;
+
+    static const WCHAR cursor_modules[][16] =
+    {
+        { 'u','s','e','r','3','2','.','d','l','l',0 },
+        { 'c','o','m','c','t','l','3','2','.','d','l','l',0 },
+        { 'o','l','e','3','2','.','d','l','l',0 },
+        { 'r','i','c','h','e','d','2','0','.','d','l','l',0 }
+    };
+
+    if (!(module = GetModuleHandleW( arg ))) return system_module_none;
+
+    for (i = 0; i < ARRAYSIZE(cursor_modules); i++)
+    {
+        if (GetModuleHandleW( cursor_modules[i] ) == module) return i;
+    }
+
+    return system_module_none;
+}
+
+
 typedef NTSTATUS (*callback_func)( UINT arg );
 static const callback_func callback_funcs[] =
 {
@@ -157,11 +181,13 @@ static const kernel_callback kernel_callbacks[] =
     x11drv_dnd_post_drop,
     x11drv_ime_set_composition_string,
     x11drv_ime_set_result,
+    x11drv_is_system_module,
     x11drv_systray_change_owner,
 };
 
 C_ASSERT( NtUserDriverCallbackFirst + ARRAYSIZE(kernel_callbacks) == client_func_last );
 
+
 BOOL WINAPI DllMain( HINSTANCE instance, DWORD reason, void *reserved )
 {
     void **callback_table;
diff --git a/dlls/winex11.drv/mouse.c b/dlls/winex11.drv/mouse.c
index d080ed5458e..adf23d04450 100644
--- a/dlls/winex11.drv/mouse.c
+++ b/dlls/winex11.drv/mouse.c
@@ -930,16 +930,12 @@ static const struct system_cursors riched20_cursors[] =
     { 0 }
 };
 
-static const struct
+static const struct system_cursors *module_cursors[] =
 {
-    const struct system_cursors *cursors;
-    WCHAR name[16];
-} module_cursors[] =
-{
-    { user32_cursors, {'u','s','e','r','3','2','.','d','l','l',0} },
-    { comctl32_cursors, {'c','o','m','c','t','l','3','2','.','d','l','l',0} },
-    { ole32_cursors, {'o','l','e','3','2','.','d','l','l',0} },
-    { riched20_cursors, {'r','i','c','h','e','d','2','0','.','d','l','l',0} }
+    user32_cursors,
+    comctl32_cursors,
+    ole32_cursors,
+    riched20_cursors,
 };
 
 struct cursor_font_fallback
@@ -1059,7 +1055,6 @@ static Cursor create_xcursor_system_cursor( const ICONINFOEXW *info )
     const struct system_cursors *cursors;
     unsigned int i;
     Cursor cursor = 0;
-    HMODULE module;
     HKEY key;
     const char * const *names = NULL;
     WCHAR *p, name[MAX_PATH * 2];
@@ -1098,13 +1093,11 @@ static Cursor create_xcursor_system_cursor( const ICONINFOEXW *info )
     }
 
     if (info->szResName[0]) goto done;  /* only integer resources are supported here */
-    if (!(module = GetModuleHandleW( info->szModName ))) goto done;
+    i = x11drv_client_func( client_func_is_system_module, info->szModName,
+                            (lstrlenW( info->szModName ) + 1) * sizeof(WCHAR) );
+    if (i == system_module_none) goto done;
 
-    for (i = 0; i < ARRAY_SIZE( module_cursors ); i++)
-        if (GetModuleHandleW( module_cursors[i].name ) == module) break;
-    if (i == ARRAY_SIZE( module_cursors )) goto done;
-
-    cursors = module_cursors[i].cursors;
+    cursors = module_cursors[i];
     for (i = 0; cursors[i].id; i++)
         if (cursors[i].id == info->wResID)
         {
diff --git a/dlls/winex11.drv/unixlib.h b/dlls/winex11.drv/unixlib.h
index dc3c74979ca..233a2578b41 100644
--- a/dlls/winex11.drv/unixlib.h
+++ b/dlls/winex11.drv/unixlib.h
@@ -66,6 +66,15 @@ struct systray_dock_params
     BOOL *layered;
 };
 
+enum system_modules
+{
+    system_module_user32,
+    system_module_comctl32,
+    system_module_ole32,
+    system_module_riched20,
+    system_module_none = 0xffff,
+};
+
 /* x11drv_tablet_info params */
 struct tablet_info_params
 {
@@ -90,6 +99,7 @@ enum x11drv_client_funcs
     client_func_dnd_post_drop,
     client_func_ime_set_composition_string,
     client_func_ime_set_result,
+    client_func_is_system_module,
     client_func_systray_change_owner,
     client_func_last
 };