diff --git a/NEWS b/NEWS
index 1c1cdde218b..0e0fe4f3526 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,9 @@ PHP                                                                        NEWS
 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 ?? ??? 2022, PHP 8.0.16
 
+- FPM:
+  . Fixed memory leak on invalid port. (David Carlier)
+
 - Sockets:
   . Fixed ext/sockets build on Haiku. (David Carlier)
 
diff --git a/sapi/fpm/fpm/fpm_sockets.c b/sapi/fpm/fpm/fpm_sockets.c
index c9c0acc7b73..99205a8fcf9 100644
--- a/sapi/fpm/fpm/fpm_sockets.c
+++ b/sapi/fpm/fpm/fpm_sockets.c
@@ -336,6 +336,7 @@ static int fpm_socket_af_inet_listening_socket(struct fpm_worker_pool_s *wp) /*
 
 	if (port == 0) {
 		zlog(ZLOG_ERROR, "invalid port value '%s'", port_str);
+		free(dup_address);
 		return -1;
 	}