diff --git a/os/osinit.c b/os/osinit.c
index 2a946a456..6c66f9c12 100644
--- a/os/osinit.c
+++ b/os/osinit.c
@@ -246,8 +246,10 @@ OsInit(void)
 #endif
         }
 
+#if !defined(WIN32) || defined(__CYGWIN__)
         if (getpgrp() == 0)
             setpgid(0, 0);
+#endif
 
 #ifdef RLIMIT_DATA
         if (limitDataSpace >= 0) {