diff --git a/ncat/ncat_listen.c b/ncat/ncat_listen.c
index 67ec811e8..2064eaa42 100644
--- a/ncat/ncat_listen.c
+++ b/ncat/ncat_listen.c
@@ -173,8 +173,10 @@ static int get_conn_count(void)
 #ifndef WIN32
 static void sigchld_handler(int signum)
 {
+    int saved_errno = errno;
     while (waitpid(-1, NULL, WNOHANG) > 0)
         decrease_conn_count();
+    errno = saved_errno;
 }
 #endif