diff --git a/src/attr_line.hh b/src/attr_line.hh
index 1d854d5f..c85c51fd 100644
--- a/src/attr_line.hh
+++ b/src/attr_line.hh
@@ -32,6 +32,8 @@
 #ifndef __attr_line_hh
 #define __attr_line_hh
 
+#include <limits.h>
+
 #include <string>
 #include <vector>