diff --git a/dlls/comctl32/commctrl.c b/dlls/comctl32/commctrl.c
index 2f08f750bda..9cfdc9bb512 100644
--- a/dlls/comctl32/commctrl.c
+++ b/dlls/comctl32/commctrl.c
@@ -627,7 +627,7 @@ InitCommonControls (void)
  */
 
 BOOL WINAPI
-InitCommonControlsEx (LPINITCOMMONCONTROLSEX lpInitCtrls)
+InitCommonControlsEx (const INITCOMMONCONTROLSEX *lpInitCtrls)
 {
     INT cCount;
     DWORD dwMask;
diff --git a/include/commctrl.h b/include/commctrl.h
index e77dee231ec..7a931f8fa19 100644
--- a/include/commctrl.h
+++ b/include/commctrl.h
@@ -36,7 +36,7 @@ typedef struct tagINITCOMMONCONTROLSEX {
     DWORD dwICC;
 } INITCOMMONCONTROLSEX, *LPINITCOMMONCONTROLSEX;
 
-BOOL WINAPI InitCommonControlsEx (LPINITCOMMONCONTROLSEX);
+BOOL WINAPI InitCommonControlsEx (const INITCOMMONCONTROLSEX*);
 
 LANGID WINAPI GetMUILanguage (VOID);
 VOID WINAPI InitMUILanguage (LANGID uiLang);