diff --git a/libsndio/aucat.c b/libsndio/aucat.c
index a56d5e6..d62a792 100644
--- a/libsndio/aucat.c
+++ b/libsndio/aucat.c
@@ -43,6 +43,11 @@
 #define DEV_RANDOM "/dev/arandom"
 #endif
 
+#ifndef SOCK_CLOEXEC
+/* not supported on debian gnu/kfreebsd */
+#define SOCK_CLOEXEC 0
+#endif
+
 static int
 random_bytes(unsigned char *buf, int len)
 {