diff --git a/os/osinit.c b/os/osinit.c
index 45ab5271b..2a946a456 100644
--- a/os/osinit.c
+++ b/os/osinit.c
@@ -102,6 +102,7 @@ OsRegisterSigWrapper(OsSigWrapperPtr newSigWrapper)
  * OsSigHandler --
  *    Catch unexpected signals and exit or continue cleanly.
  */
+#if !defined(WIN32) || defined(__CYGWIN__)
 static void
 #ifdef SA_SIGINFO
 OsSigHandler(int signo, siginfo_t * sip, void *unused)
@@ -146,6 +147,7 @@ OsSigHandler(int signo)
     FatalError("Caught signal %d (%s). Server aborting\n",
                signo, strsignal(signo));
 }
+#endif /* !WIN32 || __CYGWIN__ */
 
 void
 OsInit(void)
@@ -155,6 +157,7 @@ OsInit(void)
     char fname[PATH_MAX];
 
     if (!been_here) {
+#if !defined(WIN32) || defined(__CYGWIN__)
         struct sigaction act, oact;
         int i;
 
@@ -181,6 +184,8 @@ OsInit(void)
                        siglist[i], strerror(errno));
             }
         }
+#endif /* !WIN32 || __CYGWIN__ */
+
 #ifdef HAVE_BACKTRACE
         /*
          * initialize the backtracer, since the ctor calls dlopen(), which
diff --git a/os/utils.c b/os/utils.c
index 3c520add5..58df70902 100644
--- a/os/utils.c
+++ b/os/utils.c
@@ -212,6 +212,9 @@ sig_atomic_t inSignalContext = FALSE;
 OsSigHandlerPtr
 OsSignal(int sig, OsSigHandlerPtr handler)
 {
+#if defined(WIN32) && !defined(__CYGWIN__)
+    return signal(sig, handler);
+#else
     struct sigaction act, oact;
 
     sigemptyset(&act.sa_mask);
@@ -222,6 +225,7 @@ OsSignal(int sig, OsSigHandlerPtr handler)
     if (sigaction(sig, &act, &oact))
         perror("sigaction");
     return oact.sa_handler;
+#endif
 }
 
 /*