diff --git a/spine-cpp/spine-cpp/include/spine/ContainerUtil.h b/spine-cpp/spine-cpp/include/spine/ContainerUtil.h
index 6f9b85245..053a56634 100644
--- a/spine-cpp/spine-cpp/include/spine/ContainerUtil.h
+++ b/spine-cpp/spine-cpp/include/spine/ContainerUtil.h
@@ -31,9 +31,9 @@
 #ifndef Spine_ContainerUtil_h
 #define Spine_ContainerUtil_h
 
+#include <spine/Extension.h>
 #include <spine/Vector.h>
 #include <spine/HashMap.h>
-#include <spine/Extension.h>
 
 #include <string>
 #include <assert.h>
diff --git a/spine-cpp/spine-cpp/include/spine/HashMap.h b/spine-cpp/spine-cpp/include/spine/HashMap.h
index 372131a11..b6882b04c 100755
--- a/spine-cpp/spine-cpp/include/spine/HashMap.h
+++ b/spine-cpp/spine-cpp/include/spine/HashMap.h
@@ -31,6 +31,7 @@
 #ifndef Spine_HashMap_h
 #define Spine_HashMap_h
 
+#include <spine/Extension.h>
 #include <spine/Vector.h>
 
 namespace Spine
diff --git a/spine-cpp/spine-cpp/include/spine/Pool.h b/spine-cpp/spine-cpp/include/spine/Pool.h
index 096821476..3ea37cff3 100644
--- a/spine-cpp/spine-cpp/include/spine/Pool.h
+++ b/spine-cpp/spine-cpp/include/spine/Pool.h
@@ -31,9 +31,9 @@
 #ifndef Spine_Pool_h
 #define Spine_Pool_h
 
+#include <spine/Extension.h>
 #include <spine/Vector.h>
 #include <spine/ContainerUtil.h>
-#include <spine/Extension.h>
 
 namespace Spine
 {