diff --git a/reactos/lib/ddraw/main/clipper_main.c b/reactos/lib/ddraw/main/clipper_main.c
index 28410ebdd6d..df9c973486c 100644
--- a/reactos/lib/ddraw/main/clipper_main.c
+++ b/reactos/lib/ddraw/main/clipper_main.c
@@ -14,7 +14,7 @@
 ULONG WINAPI Main_DirectDrawClipper_Release(LPDIRECTDRAWCLIPPER iface) 
 {
     IDirectDrawImpl* This = (IDirectDrawImpl*)iface;
-    ULONG ref = InterlockedDecrement(&This->DirectDrawGlobal.dwRefCnt);
+    ULONG ref = InterlockedDecrement((PLONG)&This->DirectDrawGlobal.dwRefCnt);
     
     if (ref == 0)
 		HeapFree(GetProcessHeap(), 0, This);
diff --git a/reactos/lib/ddraw/main/color_main.c b/reactos/lib/ddraw/main/color_main.c
index 47e7aafffed..bf4cf009975 100644
--- a/reactos/lib/ddraw/main/color_main.c
+++ b/reactos/lib/ddraw/main/color_main.c
@@ -23,7 +23,7 @@ ULONG WINAPI
 Main_DirectDrawColorControl_Release(LPDIRECTDRAWCOLORCONTROL iface)
 {
     IDirectDrawImpl* This = (IDirectDrawImpl*)iface;
-    ULONG ref = InterlockedDecrement(&This->DirectDrawGlobal.dwRefCnt);
+    ULONG ref = InterlockedDecrement((PLONG)&This->DirectDrawGlobal.dwRefCnt);
     
     if (ref == 0)
 		HeapFree(GetProcessHeap(), 0, This);
diff --git a/reactos/lib/ddraw/main/gamma_main.c b/reactos/lib/ddraw/main/gamma_main.c
index 8a5bc5c0ff0..84c989dfa96 100644
--- a/reactos/lib/ddraw/main/gamma_main.c
+++ b/reactos/lib/ddraw/main/gamma_main.c
@@ -23,7 +23,7 @@ ULONG WINAPI
 Main_DirectDrawGammaControl_Release(LPDIRECTDRAWGAMMACONTROL iface)
 {
     IDirectDrawImpl* This = (IDirectDrawImpl*)iface;
-    ULONG ref = InterlockedDecrement(&This->DirectDrawGlobal.dwRefCnt);
+    ULONG ref = InterlockedDecrement((PLONG)&This->DirectDrawGlobal.dwRefCnt);
     
     if (ref == 0)
 		HeapFree(GetProcessHeap(), 0, This);
diff --git a/reactos/lib/ddraw/main/palette_main.c b/reactos/lib/ddraw/main/palette_main.c
index fd8f4a81fad..027ffe37c9c 100644
--- a/reactos/lib/ddraw/main/palette_main.c
+++ b/reactos/lib/ddraw/main/palette_main.c
@@ -22,7 +22,7 @@ Main_DirectDrawPalette_Release(LPDIRECTDRAWPALETTE iface)
 ULONG WINAPI Main_DirectDrawPalette_AddRef(LPDIRECTDRAWPALETTE iface) 
 {
     IDirectDrawImpl* This = (IDirectDrawImpl*)iface;
-    ULONG ref = InterlockedDecrement(&This->DirectDrawGlobal.dwRefCnt);
+    ULONG ref = InterlockedDecrement((PLONG)&This->DirectDrawGlobal.dwRefCnt);
     
     if (ref == 0)
 		HeapFree(GetProcessHeap(), 0, This);
diff --git a/reactos/lib/ddraw/main/surface_main.c b/reactos/lib/ddraw/main/surface_main.c
index 39c547c3f06..6939eb5b117 100644
--- a/reactos/lib/ddraw/main/surface_main.c
+++ b/reactos/lib/ddraw/main/surface_main.c
@@ -95,13 +95,13 @@ ULONG WINAPI Main_DDrawSurface_AddRef(LPDIRECTDRAWSURFACE7 iface)
 {
     IDirectDrawSurfaceImpl* This = (IDirectDrawSurfaceImpl*)iface;
 	
-    return InterlockedIncrement(&This->owner->DirectDrawGlobal.dsList->dwIntRefCnt);
+    return InterlockedIncrement((PLONG)&This->owner->DirectDrawGlobal.dsList->dwIntRefCnt);
 }
 
 ULONG WINAPI Main_DDrawSurface_Release(LPDIRECTDRAWSURFACE7 iface)
 {
     IDirectDrawSurfaceImpl* This = (IDirectDrawSurfaceImpl*)iface;
-    ULONG ref = InterlockedDecrement(&This->owner->DirectDrawGlobal.dsList->dwIntRefCnt);
+    ULONG ref = InterlockedDecrement((PLONG)&This->owner->DirectDrawGlobal.dsList->dwIntRefCnt);
     
     if (ref == 0)
 		HeapFree(GetProcessHeap(), 0, This);