diff --git a/programs/winemine/dialog.c b/programs/winemine/dialog.c
index c9139b298a9..fb7efb22a95 100644
--- a/programs/winemine/dialog.c
+++ b/programs/winemine/dialog.c
@@ -24,7 +24,7 @@
 #include "main.h"
 #include "resource.h"
 
-BOOL CALLBACK CustomDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam )
+INT_PTR CALLBACK CustomDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam )
 {
     BOOL IsRet;
     static BOARD *p_board;
@@ -56,7 +56,7 @@ BOOL CALLBACK CustomDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam
     return FALSE;
 }
 
-BOOL CALLBACK CongratsDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam )
+INT_PTR CALLBACK CongratsDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam )
 {
     static BOARD *p_board;
 
@@ -85,7 +85,7 @@ BOOL CALLBACK CongratsDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lPara
     return FALSE;
 }
 
-BOOL CALLBACK TimesDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam )
+INT_PTR CALLBACK TimesDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam )
 {
     static BOARD *p_board;
     unsigned i;
@@ -115,7 +115,7 @@ BOOL CALLBACK TimesDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam )
     return FALSE;
 }
 
-BOOL CALLBACK AboutDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam )
+INT_PTR CALLBACK AboutDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam )
 {
     switch( uMsg ) {
     case WM_INITDIALOG:
diff --git a/programs/winemine/main.h b/programs/winemine/main.h
index dba54ec1384..bc257b8e2f3 100644
--- a/programs/winemine/main.h
+++ b/programs/winemine/main.h
@@ -170,12 +170,12 @@ void DrawFace( HDC hdc, HDC hMemDC, BOARD *p_board );
 
 LRESULT WINAPI MainProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
 
-BOOL CALLBACK CustomDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam );
+INT_PTR CALLBACK CustomDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam );
 
-BOOL CALLBACK CongratsDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam );
+INT_PTR CALLBACK CongratsDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam );
 
-BOOL CALLBACK TimesDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam );
+INT_PTR CALLBACK TimesDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam );
 
-BOOL CALLBACK AboutDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam );
+INT_PTR CALLBACK AboutDlgProc( HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam );
 
 /* end of header */