diff --git a/src/shared-table.cpp b/src/shared-table.cpp
index 3d75446..a11353b 100644
--- a/src/shared-table.cpp
+++ b/src/shared-table.cpp
@@ -1,6 +1,7 @@
 #include "shared-table.h"
 
 #include <cassert>
+#include <mutex>
 
 namespace core {