diff --git a/src/FbTk/ThemeItems.cc b/src/FbTk/ThemeItems.cc
index 5fa6725d..b15b47d8 100644
--- a/src/FbTk/ThemeItems.cc
+++ b/src/FbTk/ThemeItems.cc
@@ -45,7 +45,10 @@
 #else
   #include <stdio.h>
 #endif
+
 #include <iostream>
+#include <memory>
+
 namespace FbTk {
 
 using std::string;