diff --git a/reactos/lib/setupapi/devinst.c b/reactos/lib/setupapi/devinst.c
index a8a002efe2b..ac9f41689f1 100644
--- a/reactos/lib/setupapi/devinst.c
+++ b/reactos/lib/setupapi/devinst.c
@@ -7210,7 +7210,7 @@ SetupDiInstallDeviceInterfaces(
         LPWSTR InterfaceGuidString = NULL;
         LPWSTR ReferenceString = NULL;
         LPWSTR InterfaceSection = NULL;
-        UINT InterfaceFlags;
+        INT InterfaceFlags;
         GUID InterfaceGuid;
         BOOL Result;
 
diff --git a/reactos/subsys/win32k/objects/bitmaps.c b/reactos/subsys/win32k/objects/bitmaps.c
index fe11e3681c4..a9f2718261e 100644
--- a/reactos/subsys/win32k/objects/bitmaps.c
+++ b/reactos/subsys/win32k/objects/bitmaps.c
@@ -1524,7 +1524,7 @@ BITMAPOBJ_CopyBitmap(HBITMAP  hBitmap)
 	res = IntCreateBitmapIndirect(&bm);
 	if(res)
 	{
-		char *buf;
+		PBYTE buf;
 
 		buf = ExAllocatePoolWithTag (PagedPool, bm.bmWidthBytes * abs(bm.bmHeight), TAG_BITMAP);
 		NtGdiGetBitmapBits (hBitmap, bm.bmWidthBytes * abs(bm.bmHeight), buf);