diff --git a/hw/xwin/winwin32rootless.c b/hw/xwin/winwin32rootless.c
index 660a78f2d..8fe6f4260 100644
--- a/hw/xwin/winwin32rootless.c
+++ b/hw/xwin/winwin32rootless.c
@@ -541,7 +541,7 @@ winMWExtWMRestackFrame(RootlessFrameID wid, RootlessFrameID nextWid)
 
     if (pRLNextWinPriv == NULL) {
 #if CYGMULTIWINDOW_DEBUG
-        winDebug("Win %08x is top\n", pRLWinPriv);
+        winDebug("Win %p is top\n", pRLWinPriv);
 #endif
         pScreenPriv->widTop = wid;
         SetWindowPos(pRLWinPriv->hWnd, HWND_TOP,
@@ -550,7 +550,7 @@ winMWExtWMRestackFrame(RootlessFrameID wid, RootlessFrameID nextWid)
     else if (winIsInternalWMRunning(pScreenInfo)) {
         /* using mulwinidow wm */
 #if CYGMULTIWINDOW_DEBUG
-        winDebug("Win %08x is not top\n", pRLWinPriv);
+        winDebug("Win %p is not top\n", pRLWinPriv);
 #endif
         for (hWnd = GetNextWindow(pRLWinPriv->hWnd, GW_HWNDPREV);
              fNeedRestack && hWnd != NULL;
@@ -563,7 +563,7 @@ winMWExtWMRestackFrame(RootlessFrameID wid, RootlessFrameID nextWid)
                     /* Enable interleave X window and Windows window */
                     if (!fFirst) {
 #if CYGMULTIWINDOW_DEBUG
-                        winDebug("raise: Insert after Win %08x\n",
+                        winDebug("raise: Insert after Win %p\n",
                                  pRLNextWinPriv);
 #endif
                         SetWindowPos(pRLWinPriv->hWnd, pRLNextWinPriv->hWnd,
@@ -592,7 +592,7 @@ winMWExtWMRestackFrame(RootlessFrameID wid, RootlessFrameID nextWid)
                 && GetProp(hWnd, WIN_WINDOW_PROP)) {
                 if (hWnd == pRLNextWinPriv->hWnd) {
 #if CYGMULTIWINDOW_DEBUG
-                    winDebug("lower: Insert after Win %08x\n", pRLNextWinPriv);
+                    winDebug("lower: Insert after Win %p\n", pRLNextWinPriv);
 #endif
                     SetWindowPos(pRLWinPriv->hWnd, pRLNextWinPriv->hWnd,
                                  0, 0, 0, 0,
diff --git a/hw/xwin/winwin32rootlesswindow.c b/hw/xwin/winwin32rootlesswindow.c
index 1faa531df..ba4fb5188 100644
--- a/hw/xwin/winwin32rootlesswindow.c
+++ b/hw/xwin/winwin32rootlesswindow.c
@@ -402,7 +402,7 @@ winMWExtWMRestackWindows(ScreenPtr pScreen)
 
 #if CYGMULTIWINDOW_DEBUG
                 winDebug
-                    ("winMWExtWMRestackWindows - DeferWindowPos (%08x, %08x)\n",
+                    ("winMWExtWMRestackWindows - DeferWindowPos (%p, %p)\n",
                      pRLWin->hWnd, pRLWinPrev ? pRLWinPrev->hWnd : HWND_TOP);
 #endif
                 hWinPosInfo = DeferWindowPos(hWinPosInfo, pRLWin->hWnd,
diff --git a/hw/xwin/winwin32rootlesswndproc.c b/hw/xwin/winwin32rootlesswndproc.c
index 79d959161..47de60810 100644
--- a/hw/xwin/winwin32rootlesswndproc.c
+++ b/hw/xwin/winwin32rootlesswndproc.c
@@ -417,12 +417,12 @@ winMWExtWMWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
         winDebugWin32Message("winMWExtWMWindowProc", hwnd, message, wParam,
                              lParam);
 
-        winDebug("\thWnd %08X\n", hwnd);
-        winDebug("\tpScreenPriv %08X\n", pScreenPriv);
-        winDebug("\tpScreenInfo %08X\n", pScreenInfo);
-        winDebug("\thwndScreen %08X\n", hwndScreen);
-        winDebug("winMWExtWMWindowProc (%08x) %08x %08x %08x\n",
-                 pRLWinPriv, message, wParam, lParam);
+        winDebug("\thWnd %p\n", hwnd);
+        winDebug("\tpScreenPriv %p\n", pScreenPriv);
+        winDebug("\tpScreenInfo %p\n", pScreenInfo);
+        winDebug("\thwndScreen %p\n", hwndScreen);
+        winDebug("winMWExtWMWindowProc (%p) %08x %08x %08x\n",
+                 pRLWinPriv, message, (int)wParam, (int)lParam);
 #endif
     }
     /* Branch on message type */
diff --git a/hw/xwin/winwindowswm.c b/hw/xwin/winwindowswm.c
index db41d6b60..b9399fae3 100644
--- a/hw/xwin/winwindowswm.c
+++ b/hw/xwin/winwindowswm.c
@@ -312,7 +312,7 @@ ProcWindowsWMFrameGetRect(ClientPtr client)
     REQUEST(xWindowsWMFrameGetRectReq);
 
 #if CYGMULTIWINDOW_DEBUG
-    ErrorF("ProcWindowsWMFrameGetRect %d %d\n",
+    ErrorF("ProcWindowsWMFrameGetRect %zu %d\n",
            (sizeof(xWindowsWMFrameGetRectReq) >> 2), (int) client->req_len);
 #endif