diff --git a/src/CompileCommand.h b/src/CompileCommand.h
index ba87d7d..582d2b4 100644
--- a/src/CompileCommand.h
+++ b/src/CompileCommand.h
@@ -2,6 +2,7 @@
 #define COMPILECOMMAND_H_
 #include <clang-c/CXCompilationDatabase.h>
 #include <vector>
+#include <string>
 
 namespace clang {
   class CompileCommand {