diff --git a/src/modules/module-protocol-native.c b/src/modules/module-protocol-native.c
index 131657f..7b56863 100644
--- a/src/modules/module-protocol-native.c
+++ b/src/modules/module-protocol-native.c
@@ -58,6 +58,11 @@
 #define UNIX_PATH_MAX   108
 #endif
 
+/* Required for s390x */
+#ifndef SO_PEERSEC
+#define SO_PEERSEC 31
+#endif
+
 static bool debug_messages = 0;
 
 #define LOCK_SUFFIX     ".lock"