diff --git a/src/include/ctrlclass.h b/src/include/ctrlclass.h
index ed1da84f..26570c9d 100644
--- a/src/include/ctrlclass.h
+++ b/src/include/ctrlclass.h
@@ -115,6 +115,13 @@ typedef struct _CONTROL
     DWORD dwAddData;        // the additional data.
     DWORD dwAddData2;       // the second addtional data.
 
+    /*
+     * The following members are only implemented for control.
+     */
+    struct _CONTROL* next;      // the next sibling control.
+    struct _CONTROL* prev;      // the prev sibling control.
+    MASKRECT * mask_rects;      // mask rectangles for the control.
+
     /*
      * Fields for appearance of this control.
      */
@@ -176,11 +183,6 @@ typedef struct _CONTROL
     /*
      * The following members are only implemented for control.
      */
-    struct _CONTROL* next;      // the next sibling control.
-    struct _CONTROL* prev;      // the prev sibling control.
-
-    MASKRECT * mask_rects;
-
     /*
      * if a control is has WS_EX_CTRLASMAINWIN,
      * this field is the next control as main window