diff --git a/src/kernel/cs_main.cpp b/src/kernel/cs_main.cpp
index c3a08c9695..d27cb7caf3 100644
--- a/src/kernel/cs_main.cpp
+++ b/src/kernel/cs_main.cpp
@@ -2,6 +2,7 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+#include <kernel/cs_main.h>
 #include <sync.h>
 
 RecursiveMutex cs_main;