diff --git a/common/memory.cc b/common/memory.cc
index 6e09f84..ed84ba7 100644
--- a/common/memory.cc
+++ b/common/memory.cc
@@ -17,6 +17,7 @@
  */
 
 #include <sstream>
+#include <string>
 
 #include "memory.h"
 #include "luts.h"