diff --git a/source/glest_game/types/skill_type.cpp b/source/glest_game/types/skill_type.cpp
index 14f218b4..90d3f782 100644
--- a/source/glest_game/types/skill_type.cpp
+++ b/source/glest_game/types/skill_type.cpp
@@ -12,6 +12,7 @@
 #include "skill_type.h"
 
 #include <cassert>
+#include <iterator>
 
 #include "sound.h"
 #include "util.h"
diff --git a/source/glest_game/types/upgrade_type.cpp b/source/glest_game/types/upgrade_type.cpp
index 2c5a6e2f..78ad754a 100644
--- a/source/glest_game/types/upgrade_type.cpp
+++ b/source/glest_game/types/upgrade_type.cpp
@@ -13,6 +13,7 @@
 
 #include <algorithm>
 #include <cassert>
+#include <iterator>
 
 #include "unit_type.h"
 #include "util.h"