diff --git a/inc/dd.h b/inc/dd.h
index 5fa56a4..1835700 100644
--- a/inc/dd.h
+++ b/inc/dd.h
@@ -80,7 +80,7 @@ typedef struct cnc_ddraw
     } render;
 
     HWND hwnd;
-    LRESULT (CALLBACK *wndproc)(HWND, UINT, WPARAM, LPARAM);
+    WNDPROC wndproc;
     struct { float x; float y; } cursor;
     BOOL locked;
     BOOL adjmouse;
diff --git a/src/dd.c b/src/dd.c
index 9ab4e0f..fc8c278 100644
--- a/src/dd.c
+++ b/src/dd.c
@@ -660,9 +660,7 @@ HRESULT dd_SetCooperativeLevel(HWND hwnd, DWORD dwFlags)
     {
         hook_init();
 
-        g_ddraw->wndproc = (LRESULT(CALLBACK *)(HWND, UINT, WPARAM, LPARAM))GetWindowLong(hwnd, GWL_WNDPROC);
-
-        real_SetWindowLongA(g_ddraw->hwnd, GWL_WNDPROC, (LONG)fake_WndProc);
+        g_ddraw->wndproc = (WNDPROC)real_SetWindowLongA(g_ddraw->hwnd, GWL_WNDPROC, (LONG)fake_WndProc);
 
         if (!g_ddraw->render.hdc)
         {
diff --git a/src/wndproc.c b/src/wndproc.c
index f3503f4..240959c 100644
--- a/src/wndproc.c
+++ b/src/wndproc.c
@@ -707,5 +707,5 @@ LRESULT CALLBACK fake_WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam
         }
     }
 
-    return g_ddraw->wndproc(hWnd, uMsg, wParam, lParam);
+    return CallWindowProcA(g_ddraw->wndproc, hWnd, uMsg, wParam, lParam);
 }