diff --git a/reactos/include/reactos/win32k/ntgdihdl.h b/reactos/include/reactos/win32k/ntgdihdl.h
index 1afdee9dfe8..8a0f7c7a2d9 100644
--- a/reactos/include/reactos/win32k/ntgdihdl.h
+++ b/reactos/include/reactos/win32k/ntgdihdl.h
@@ -226,6 +226,10 @@ typedef struct _DC_ATTR
     MATRIX_S mxWorldToDevice;
     MATRIX_S mxDevicetoWorld;
     MATRIX_S mxWorldToPage;
+    EFLOAT_S efM11PtoD;
+    EFLOAT_S efM22PtoD;
+    EFLOAT_S efDxPtoD;
+    EFLOAT_S efDyPtoD;
     INT iMapMode;
     DWORD dwLayout;
     LONG lWindowOrgx;