1 files changed, 2 insertions, 0 deletions
diff --git a/src/lexer.in.cc b/src/lexer.in.cc
index c1fb822..88007e7 100644
--- a/src/lexer.in.cc
+++ b/src/lexer.in.cc
@@ -19,6 +19,8 @@
 #include "eval_env.h"
 #include "util.h"
 
+using namespace std;
+
 bool Lexer::Error(const string& message, string* err) {
   // Compute line/column.
   int line = 1;