diff --git a/include/plasp/pddl/Type.h b/include/plasp/pddl/Type.h
index 9456c76..f6f6756 100644
--- a/include/plasp/pddl/Type.h
+++ b/include/plasp/pddl/Type.h
@@ -1,6 +1,8 @@
 #ifndef __PLASP__PDDL__TYPE_H
 #define __PLASP__PDDL__TYPE_H
 
+#include <unordered_map>
+
 #include <boost/variant.hpp>
 
 #include <plasp/pddl/TypePrimitive.h>
diff --git a/include/plasp/pddl/TypePrimitive.h b/include/plasp/pddl/TypePrimitive.h
index d98a4e0..59fdc30 100644
--- a/include/plasp/pddl/TypePrimitive.h
+++ b/include/plasp/pddl/TypePrimitive.h
@@ -1,9 +1,7 @@
 #ifndef __PLASP__PDDL__TYPE_PRIMITIVE_H
 #define __PLASP__PDDL__TYPE_PRIMITIVE_H
 
-#include <functional>
 #include <string>
-#include <unordered_map>
 #include <vector>
 
 #include <plasp/utils/Parser.h>