--- a/profile/dirserviceprovider/src/nsProfileLock.cpp
+++ b/profile/dirserviceprovider/src/nsProfileLock.cpp
@@ -66,33 +66,35 @@
 #endif
 
 // **********************************************************************
 // class nsProfileLock
 //
 // This code was moved from profile/src/nsProfileAccess.
 // **********************************************************************
 
+#if defined (XP_UNIX)
 static PRBool sDisableSignalHandling = PR_FALSE;
+#endif
 
 nsProfileLock::nsProfileLock() :
     mHaveLock(PR_FALSE)
 #if defined (XP_WIN)
     ,mLockFileHandle(INVALID_HANDLE_VALUE)
 #elif defined (XP_OS2)
     ,mLockFileHandle(-1)
 #elif defined (XP_UNIX)
     ,mPidLockFileName(nsnull)
     ,mLockFileDesc(-1)
 #endif
 {
 #if defined (XP_UNIX)
     next = prev = this;
+    sDisableSignalHandling = PR_GetEnv("MOZ_DISABLE_SIG_HANDLER") ? PR_TRUE : PR_FALSE;
 #endif
-    sDisableSignalHandling = PR_GetEnv("MOZ_DISABLE_SIG_HANDLER") ? PR_TRUE : PR_FALSE;
 }
 
 
 nsProfileLock::nsProfileLock(nsProfileLock& src)
 {
     *this = src;
 }