diff -up wine-mozilla-2.24/xpcom/ds/moz.build.orig wine-mozilla-2.24/xpcom/ds/moz.build
--- wine-mozilla-2.24/xpcom/ds/moz.build.orig	2013-09-28 11:46:34.168708454 +0200
+++ wine-mozilla-2.24/xpcom/ds/moz.build	2013-09-28 11:49:09.577439964 +0200
@@ -98,7 +98,11 @@ CPP_SOURCES += [
     'TimeStamp.cpp',
 ]
 
-if CONFIG['HAVE_CLOCK_MONOTONIC']:
+if CONFIG['OS_ARCH'] == 'WINNT':
+    CPP_SOURCES += [
+        'TimeStamp_windows.cpp',
+    ]
+elif CONFIG['HAVE_CLOCK_MONOTONIC']:
     CPP_SOURCES += [
         'TimeStamp_posix.cpp',
     ]
@@ -106,10 +110,6 @@ elif CONFIG['OS_ARCH'] == 'Darwin':
     CPP_SOURCES += [
         'TimeStamp_darwin.cpp',
     ]
-elif CONFIG['OS_ARCH'] == 'WINNT':
-    CPP_SOURCES += [
-        'TimeStamp_windows.cpp',
-    ]
 else:
     error('No TimeStamp implementation on this platform.  Build will not succeed')