diff --git a/dlls/comctl32/theme_combo.c b/dlls/comctl32/theme_combo.c
index b4007db8a6b..af6eee8dbb7 100644
--- a/dlls/comctl32/theme_combo.c
+++ b/dlls/comctl32/theme_combo.c
@@ -45,7 +45,7 @@ WINE_DEFAULT_DEBUG_CHANNEL(themingcombo);
 #define EDIT_CONTROL_PADDING   1
 
 /* paint text of combobox, needed for read-only drop downs. */
-static void paint_text (HWND hwnd, HDC hdc, DWORD dwStyle, COMBOBOXINFO* cbi)
+static void paint_text (HWND hwnd, HDC hdc, DWORD dwStyle, const COMBOBOXINFO *cbi)
 {
     INT  id, size = 0;
     LPWSTR pText = NULL;
diff --git a/dlls/comctl32/tooltips.c b/dlls/comctl32/tooltips.c
index 4825d1b5a0c..e9fcbf217bc 100644
--- a/dlls/comctl32/tooltips.c
+++ b/dlls/comctl32/tooltips.c
@@ -435,7 +435,7 @@ TOOLTIPS_GetTipText (HWND hwnd, TOOLTIPS_INFO *infoPtr, INT nTool)
 
 
 static void
-TOOLTIPS_CalcTipSize (HWND hwnd, TOOLTIPS_INFO *infoPtr, LPSIZE lpSize)
+TOOLTIPS_CalcTipSize (HWND hwnd, const TOOLTIPS_INFO *infoPtr, LPSIZE lpSize)
 {
     HDC hdc;
     HFONT hOldFont;
@@ -816,7 +816,7 @@ TOOLTIPS_TrackShow (HWND hwnd, TOOLTIPS_INFO *infoPtr)
 
 
 static void
-TOOLTIPS_TrackHide (HWND hwnd, TOOLTIPS_INFO *infoPtr)
+TOOLTIPS_TrackHide (HWND hwnd, const TOOLTIPS_INFO *infoPtr)
 {
     TTTOOL_INFO *toolPtr;
     NMHDR hdr;
@@ -840,7 +840,7 @@ TOOLTIPS_TrackHide (HWND hwnd, TOOLTIPS_INFO *infoPtr)
 
 
 static INT
-TOOLTIPS_GetToolFromInfoA (TOOLTIPS_INFO *infoPtr, LPTTTOOLINFOA lpToolInfo)
+TOOLTIPS_GetToolFromInfoA (const TOOLTIPS_INFO *infoPtr, const TTTOOLINFOA *lpToolInfo)
 {
     TTTOOL_INFO *toolPtr;
     INT nTool;
@@ -867,7 +867,7 @@ TOOLTIPS_GetToolFromInfoA (TOOLTIPS_INFO *infoPtr, LPTTTOOLINFOA lpToolInfo)
 
 
 static INT
-TOOLTIPS_GetToolFromInfoW (TOOLTIPS_INFO *infoPtr, LPTTTOOLINFOW lpToolInfo)
+TOOLTIPS_GetToolFromInfoW (const TOOLTIPS_INFO *infoPtr, const TTTOOLINFOW *lpToolInfo)
 {
     TTTOOL_INFO *toolPtr;
     INT nTool;
@@ -894,7 +894,7 @@ TOOLTIPS_GetToolFromInfoW (TOOLTIPS_INFO *infoPtr, LPTTTOOLINFOW lpToolInfo)
 
 
 static INT
-TOOLTIPS_GetToolFromPoint (TOOLTIPS_INFO *infoPtr, HWND hwnd, LPPOINT lpPt)
+TOOLTIPS_GetToolFromPoint (const TOOLTIPS_INFO *infoPtr, HWND hwnd, const POINT *lpPt)
 {
     TTTOOL_INFO *toolPtr;
     INT  nTool;