diff --git a/include/d2d1effects.idl b/include/d2d1effects.idl
index 5dde46cbb6a..4154276345b 100644
--- a/include/d2d1effects.idl
+++ b/include/d2d1effects.idl
@@ -18,6 +18,7 @@
 
 cpp_quote("DEFINE_GUID(CLSID_D2D12DAffineTransform,      0x6aa97485,0x6354,0x4cfc,0x90,0x8c,0xe4,0xa7,0x4f,0x62,0xc9,0x6c);")
 cpp_quote("DEFINE_GUID(CLSID_D2D13DPerspectiveTransform, 0xc2844d0b,0x3d86,0x46e7,0x85,0xba,0x52,0x6c,0x92,0x40,0xf3,0xfb);")
+cpp_quote("DEFINE_GUID(CLSID_D2D1Composite,              0x48fc9f51,0xf6ac,0x48f1,0x8b,0x58,0x3b,0x28,0xac,0x46,0xf7,0x6d);")
 
 typedef enum D2D1_BORDER_MODE
 {
@@ -68,3 +69,9 @@ typedef enum D2D1_3DPERSPECTIVETRANSFORM_INTERPOLATION_MODE
     D2D1_3DPERSPECTIVETRANSFORM_INTERPOLATION_MODE_ANISOTROPIC = 0x4,
     D2D1_3DPERSPECTIVETRANSFORM_INTERPOLATION_MODE_FORCE_DWORD = 0xffffffff
 } D2D1_3DPERSPECTIVETRANSFORM_INTERPOLATION_MODE;
+
+typedef enum D2D1_COMPOSITE_PROP
+{
+    D2D1_COMPOSITE_PROP_MODE = 0x0,
+    D2D1_COMPOSITE_PROP_FORCE_DWORD = 0xffffffff
+} D2D1_COMPOSITE_PROP;