diff --git a/src/chunks/chunks.cpp b/src/chunks/chunks.cpp
index faec406..e610822 100644
--- a/src/chunks/chunks.cpp
+++ b/src/chunks/chunks.cpp
@@ -17,6 +17,8 @@
 #include "../geometry/triangle.h"
 #include "../geometry/vector2.h"
 #include "../geometry/vector3.h"
+#include <string>
+#include <vector>
 
 void WriteFileHeader(FILE *fp)
 {
diff --git a/src/chunks/groups.h b/src/chunks/groups.h
index ceb3a1e..dcf320c 100644
--- a/src/chunks/groups.h
+++ b/src/chunks/groups.h
@@ -3,6 +3,7 @@
 
 #include "../common.h"
 #include "../geometry/group.h"
+#include <vector>
 
 struct GroupsChunk
 {
diff --git a/src/geometry/group.h b/src/geometry/group.h
index f9dc049..be4f7fa 100644
--- a/src/geometry/group.h
+++ b/src/geometry/group.h
@@ -2,7 +2,7 @@
 #define __GEOMETRY_GROUP_H_INCLUDED__
 
 #include "../common.h"
-#include <string.h>
+#include <string>
 
 struct Group
 {
diff --git a/src/geometry/joint.h b/src/geometry/joint.h
index cac5c33..9c437f8 100644
--- a/src/geometry/joint.h
+++ b/src/geometry/joint.h
@@ -3,7 +3,7 @@
 
 #include "../common.h"
 #include "vector3.h"
-#include <string.h>
+#include <string>
 
 struct Joint
 {