diff --git a/src/engine/log.h b/src/engine/log.h
index dce1807c..7f56fa13 100644
--- a/src/engine/log.h
+++ b/src/engine/log.h
@@ -19,6 +19,8 @@
 #ifndef LOG_H
 #define LOG_H
 
+#include <string>
+
 #include "engine_defs.h"
 #include "game_defs.h"