diff --git a/dlls/shell32/shell32_main.c b/dlls/shell32/shell32_main.c
index 336a519a692..c53d726ed1a 100644
--- a/dlls/shell32/shell32_main.c
+++ b/dlls/shell32/shell32_main.c
@@ -876,7 +876,7 @@ static BOOL __get_dropline( HWND hWnd, LPRECT lprect )
 /*************************************************************************
  * SHAppBarMessage            [SHELL32.@]
  */
-UINT WINAPI SHAppBarMessage(DWORD msg, PAPPBARDATA data)
+UINT_PTR WINAPI SHAppBarMessage(DWORD msg, PAPPBARDATA data)
 {
     int width=data->rc.right - data->rc.left;
     int height=data->rc.bottom - data->rc.top;
diff --git a/include/shellapi.h b/include/shellapi.h
index 5b77e5389ea..67e89235c9c 100644
--- a/include/shellapi.h
+++ b/include/shellapi.h
@@ -95,7 +95,7 @@ typedef struct _AppBarData
 	LPARAM	lParam;
 } APPBARDATA, *PAPPBARDATA;
 
-UINT    WINAPI SHAppBarMessage(DWORD,PAPPBARDATA);
+UINT_PTR WINAPI SHAppBarMessage(DWORD,PAPPBARDATA);
 
 /******************************************
  * SHGetFileInfo