diff --git a/reactos/subsystems/win32/win32k/eng/surface.c b/reactos/subsystems/win32/win32k/eng/surface.c
index 5d3075be480..317cf0497bb 100644
--- a/reactos/subsystems/win32/win32k/eng/surface.c
+++ b/reactos/subsystems/win32/win32k/eng/surface.c
@@ -558,6 +558,16 @@ EngLockSurface(IN HSURF Surface)
    return NULL;
 }
 
+
+/*
+ * @implemented
+ */
+VOID STDCALL
+NtGdiEngUnLockSurface(IN SURFOBJ *Surface)
+{
+    EngUnlockSurface(Surface);
+}
+
 /*
  * @implemented
  */
@@ -567,4 +577,6 @@ EngUnlockSurface(IN SURFOBJ *Surface)
    if (Surface != NULL)
       GDIOBJ_UnlockObjByPtr(GdiHandleTable, Surface);
 }
+
+
 /* EOF */
diff --git a/reactos/subsystems/win32/win32k/w32ksvc.db b/reactos/subsystems/win32/win32k/w32ksvc.db
index 9b84e88af98..086c4d3d9e5 100644
--- a/reactos/subsystems/win32/win32k/w32ksvc.db
+++ b/reactos/subsystems/win32/win32k/w32ksvc.db
@@ -615,7 +615,7 @@ NtGdiEngCopyBits                                 6
 NtGdiEngDeletePalette                            1
 NtGdiEngDeleteSurface                            1
 NtGdiEngEraseSurface                             3
-# NtGdiEngUnlockSurface                            1
+NtGdiEngUnlockSurface                            1
 NtGdiEngLockSurface                              1
 NtGdiEngBitBlt                                  11
 NtGdiEngStretchBlt                              11