diff --git a/reactos/include/reactos/win32k/ntgdityp.h b/reactos/include/reactos/win32k/ntgdityp.h
index 61a2338725f..59917e8cc83 100644
--- a/reactos/include/reactos/win32k/ntgdityp.h
+++ b/reactos/include/reactos/win32k/ntgdityp.h
@@ -77,6 +77,8 @@ typedef enum _GETDCPOINT
     GdiGetDCOrg = 6,
 } GETDCPOINT, *PGETDCPOINT;
 
+#define GDIBATCHBUFSIZE 0x136
+
 typedef enum _GDIBATCHCMD
 {
     GdiBCPatBlt,
diff --git a/reactos/subsystems/win32/win32k/objects/dcutil.c b/reactos/subsystems/win32/win32k/objects/dcutil.c
index e6414a0221e..f8e85cd9425 100644
--- a/reactos/subsystems/win32/win32k/objects/dcutil.c
+++ b/reactos/subsystems/win32/win32k/objects/dcutil.c
@@ -324,7 +324,7 @@ NtGdiFlushUserBatch(VOID)
   PTEB pTeb = NtCurrentTeb();
   ULONG GdiBatchCount = pTeb->GdiBatchCount;
   
-  if( (GdiBatchCount > 0) && (GdiBatchCount <= 310))  // 310 UL size of Buffer in TEB.
+  if( (GdiBatchCount > 0) && (GdiBatchCount <= GDIBATCHBUFSIZE))
   {
     HDC hDC = (HDC) pTeb->GdiTebBatch.HDC;
     if (hDC)