diff --git a/hw/xwin/winclipboard/wndproc.c b/hw/xwin/winclipboard/wndproc.c
index e1517f207..d17cf2e86 100644
--- a/hw/xwin/winclipboard/wndproc.c
+++ b/hw/xwin/winclipboard/wndproc.c
@@ -194,9 +194,9 @@ winClipboardWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
 
     case WM_CHANGECBCHAIN:
     {
-        winDebug("winClipboardWindowProc - WM_CHANGECBCHAIN: wParam(%x) "
-                 "lParam(%x) s_hwndNextViewer(%p)\n",
-                 wParam, lParam, s_hwndNextViewer);
+        winDebug("winClipboardWindowProc - WM_CHANGECBCHAIN: wParam(%p) "
+                 "lParam(%p) s_hwndNextViewer(%p)\n",
+                 (HWND)wParam, (HWND)lParam, s_hwndNextViewer);
 
         if ((HWND) wParam == s_hwndNextViewer) {
             s_hwndNextViewer = (HWND) lParam;
@@ -441,7 +441,7 @@ winClipboardWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
         int best_target = 0;
 
         winDebug("winClipboardWindowProc - WM_RENDERFORMAT %d - Hello.\n",
-                 wParam);
+                 (int)wParam);
 
         /* Flag whether to convert to Unicode or not */
         fConvertToUnicode = (CF_UNICODETEXT == wParam);
diff --git a/hw/xwin/winkeybd.c b/hw/xwin/winkeybd.c
index f0342259b..ab53af4ba 100644
--- a/hw/xwin/winkeybd.c
+++ b/hw/xwin/winkeybd.c
@@ -74,7 +74,7 @@ winTranslateKey(WPARAM wParam, LPARAM lParam)
     int iParamScanCode = LOBYTE(iParam);
     int iScanCode;
 
-    winDebug("winTranslateKey: wParam %08x lParam %08x\n", wParam, lParam);
+    winDebug("winTranslateKey: wParam %08x lParam %08x\n", (int)wParam, (int)lParam);
 
 /* WM_ key messages faked by Vista speech recognition (WSR) don't have a
  * scan code.
diff --git a/hw/xwin/winmsg.c b/hw/xwin/winmsg.c
index 79399a40f..575bc47b2 100644
--- a/hw/xwin/winmsg.c
+++ b/hw/xwin/winmsg.c
@@ -158,8 +158,8 @@ winDebugWin32Message(const char *function, HWND hwnd, UINT message,
             getenv("WIN_DEBUG_WM_USER")) {
             winDebug("%s - Message WM_USER + %d\n", function,
                      message - WM_USER);
-            winDebug("\thwnd 0x%p wParam 0x%x lParam 0x%x\n", hwnd, wParam,
-                     lParam);
+            winDebug("\thwnd 0x%p wParam 0x%x lParam 0x%x\n", hwnd, (int)wParam,
+                     (int)lParam);
         }
     }
     else if (message < MESSAGE_NAMES_LEN && MESSAGE_NAMES[message]) {
@@ -170,8 +170,8 @@ winDebugWin32Message(const char *function, HWND hwnd, UINT message,
         buffer[63] = 0;
         if (force || getenv("WIN_DEBUG_MESSAGES") || getenv(buffer)) {
             winDebug("%s - Message %s\n", function, MESSAGE_NAMES[message]);
-            winDebug("\thwnd 0x%p wParam 0x%x lParam 0x%x\n", hwnd, wParam,
-                     lParam);
+            winDebug("\thwnd 0x%p wParam 0x%x lParam 0x%x\n", hwnd, (int)wParam,
+                     (int)lParam);
         }
     }
 }
diff --git a/hw/xwin/winwndproc.c b/hw/xwin/winwndproc.c
index 3228fa481..123b84f31 100644
--- a/hw/xwin/winwndproc.c
+++ b/hw/xwin/winwndproc.c
@@ -168,7 +168,7 @@ winWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
 
         ErrorF("winWindowProc - WM_DISPLAYCHANGE - new width: %d "
                "new height: %d new bpp: %d\n",
-               LOWORD(lParam), HIWORD(lParam), wParam);
+               LOWORD(lParam), HIWORD(lParam), (int)wParam);
 
         /* 0 bpp has no defined meaning, ignore this message */
         if (wParam == 0)