diff --git a/reactos/subsystems/win32/win32k/include/dc.h b/reactos/subsystems/win32/win32k/include/dc.h
index db0aa70777b..4c400427717 100644
--- a/reactos/subsystems/win32/win32k/include/dc.h
+++ b/reactos/subsystems/win32/win32k/include/dc.h
@@ -12,7 +12,23 @@
 
 #define  GDI_DC_TYPE  (1)
 
-
+// GDIDEVICE flags
+#define PDEV_DISPLAY             0x00000001 // Display device
+#define PDEV_HARDWARE_POINTER    0x00000002 // Supports hardware cursor
+#define PDEV_SOFTWARE_POINTER    0x00000004
+#define PDEV_GOTFONTS            0x00000040 // Has font driver
+#define PDEV_PRINTER             0x00000080
+#define PDEV_ALLOCATEDBRUSHES    0x00000100
+#define PDEV_HTPAL_IS_DEVPAL     0x00000200
+#define PDEV_DISABLED            0x00000400
+#define PDEV_SYNCHRONIZE_ENABLED 0x00000800
+#define PDEV_FONTDRIVER          0x00002000 // Font device
+#define PDEV_GAMMARAMP_TABLE     0x00004000
+#define PDEV_UMPD                0x00008000
+#define PDEV_SHARED_DEVLOCK      0x00010000
+#define PDEV_META_DEVICE         0x00020000
+#define PDEV_DRIVER_PUNTED_CALL  0x00040000 // Driver calls back to GDI engine
+#define PDEV_CLONE_DEVICE        0x00080000
 
 typedef struct _GDIPOINTER /* should stay private to ENG */
 {
@@ -40,6 +56,7 @@ typedef struct
   ULONG  lucExcLock;
   ULONG  Tid;
 
+  FLONG  flFlags;
   PERESOURCE hsemDevLock;
 
   PVOID  pvGammaRamp;