diff --git a/reactos/subsystems/win32/win32k/include/color.h b/reactos/subsystems/win32/win32k/include/color.h
index 0489217ea6b..c97c1d78987 100644
--- a/reactos/subsystems/win32/win32k/include/color.h
+++ b/reactos/subsystems/win32/win32k/include/color.h
@@ -25,6 +25,12 @@ typedef struct _COLORSPACE
 #define  COLORSPACEOBJ_LockCS(hCS) ((PCOLORSPACE)GDIOBJ_LockObj((HGDIOBJ)hCS, GDI_OBJECT_TYPE_COLORSPACE))
 #define  COLORSPACEOBJ_UnlockCS(pCS) GDIOBJ_UnlockObjByPtr((POBJ)pCS)
 
+typedef struct _COLORTRANSFORMOBJ
+{
+  BASEOBJECT BaseObject;
+  HANDLE     hColorTransform; 
+} GDICLRXFORM, COLORTRANSFORMOBJ, *PCOLORTRANSFORMOBJ;
+
 extern HCOLORSPACE hStockColorSpace;
 
 const PALETTEENTRY* FASTCALL COLOR_GetSystemPaletteTemplate (VOID);
diff --git a/reactos/subsystems/win32/win32k/include/gdiobj.h b/reactos/subsystems/win32/win32k/include/gdiobj.h
index 180f95d42e1..543f28760e6 100644
--- a/reactos/subsystems/win32/win32k/include/gdiobj.h
+++ b/reactos/subsystems/win32/win32k/include/gdiobj.h
@@ -47,6 +47,11 @@ typedef struct _BASEOBJECT
   PW32THREAD  Tid;
 } BASEOBJECT, *POBJ;
 
+typedef struct _CLIENTOBJ
+{
+  BASEOBJECT BaseObject;
+} CLIENTOBJ, *PCLIENTOBJ;
+
 enum BASEFLAGS
 {
     BASEFLAG_LOOKASIDE = 0x80
diff --git a/reactos/subsystems/win32/win32k/objects/gdiobj.c b/reactos/subsystems/win32/win32k/objects/gdiobj.c
index 3aa4ff0a1f0..328458c420a 100644
--- a/reactos/subsystems/win32/win32k/objects/gdiobj.c
+++ b/reactos/subsystems/win32/win32k/objects/gdiobj.c
@@ -56,15 +56,15 @@ OBJ_TYPE_INFO ObjTypeInfo[] =
   {1, 0,                     0,                NULL},             /* 03 UNUSED2 */
   {1, sizeof(ROSRGNDATA),    TAG_REGION,       REGION_Cleanup},   /* 04 RGN */
   {1, sizeof(BITMAPOBJ),     TAG_SURFACE,      BITMAP_Cleanup},   /* 05 SURFACE */
-  {0, sizeof(DC),            TAG_CLIENTOBJ,    GDI_CleanupDummy}, /* 06 CLIENTOBJ: METADC,... FIXME: don't use DC struct */
+  {1, sizeof(CLIENTOBJ),     TAG_CLIENTOBJ,    GDI_CleanupDummy}, /* 06 CLIENTOBJ: METADC,... */
   {0, 0,                     TAG_PATH,         NULL},             /* 07 PATH, unused */
   {1, sizeof(PALGDI),        TAG_PALETTE,      PALETTE_Cleanup},  /* 08 PAL */
-  {1, sizeof(COLORSPACE),    TAG_ICMLCS,       GDI_CleanupDummy}, /* 09 ICMLCS, unused */
+  {1, sizeof(COLORSPACE),    TAG_ICMLCS,       GDI_CleanupDummy}, /* 09 ICMLCS, */
   {1, sizeof(TEXTOBJ),       TAG_LFONT,        GDI_CleanupDummy}, /* 0a LFONT */
   {0, 0,                     TAG_RFONT,        NULL},             /* 0b RFONT, unused */
   {0, 0,                     TAG_PFE,          NULL},             /* 0c PFE, unused */
   {0, 0,                     TAG_PFT,          NULL},             /* 0d PFT, unused */
-  {0, 0,                     TAG_ICMCXF,       NULL},             /* 0e ICMCXF, unused */
+  {0, sizeof(GDICLRXFORM),   TAG_ICMCXF,       GDI_CleanupDummy}, /* 0e ICMCXF, */
   {0, 0,                     TAG_SPRITE,       NULL},             /* 0f SPRITE, unused */
   {1, sizeof(GDIBRUSHOBJ),   TAG_BRUSH,        BRUSH_Cleanup},    /* 10 BRUSH, PEN, EXTPEN */
   {0, 0,                     TAG_UMPD,         NULL},             /* 11 UMPD, unused */