diff --git a/include/osmocom/mgcp_client/mgcp_client_pool.h b/include/osmocom/mgcp_client/mgcp_client_pool.h
index 949e870..b547b78 100644
--- a/include/osmocom/mgcp_client/mgcp_client_pool.h
+++ b/include/osmocom/mgcp_client/mgcp_client_pool.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <stdbool.h>
+
 struct mgcp_client;
 struct mgcp_client_pool;
 struct mgcp_client_pool_member;