diff --git a/src/lib_cxx/utility/CompilationDatabase.h b/src/lib_cxx/utility/CompilationDatabase.h
index cefa2c8d..0cac86f6 100644
--- a/src/lib_cxx/utility/CompilationDatabase.h
+++ b/src/lib_cxx/utility/CompilationDatabase.h
@@ -1,6 +1,7 @@
 #ifndef UTILITY_COMPLIATION_DATABASE_H
 #define UTILITY_COMPLIATION_DATABASE_H
 
+#include <string>
 #include <vector>
 
 class FilePath;