diff --git a/src/utility/smartPtrInt.cpp b/src/utility/smartPtrInt.cpp
index dcbfb431..2bb9d70d 100644
--- a/src/utility/smartPtrInt.cpp
+++ b/src/utility/smartPtrInt.cpp
@@ -24,12 +24,6 @@
 #include "vmime/utility/smartPtrInt.hpp"
 #include "vmime/object.hpp"
 
-#if defined(_WIN32)
-#	include <windows.h>
-#elif defined(VMIME_HAVE_PTHREAD)
-#	include <pthread.h>
-#endif
-
 
 namespace vmime {
 namespace utility {
diff --git a/vmime/utility/smartPtrInt.hpp b/vmime/utility/smartPtrInt.hpp
index 0cd86b15..36c4ff01 100644
--- a/vmime/utility/smartPtrInt.hpp
+++ b/vmime/utility/smartPtrInt.hpp
@@ -28,6 +28,12 @@
 #include "vmime/config.hpp"
 #include "vmime/utility/smartPtr.hpp"
 
+#if defined(_WIN32)
+#	include <windows.h>
+#elif defined(VMIME_HAVE_PTHREAD)
+#	include <pthread.h>
+#endif
+
 
 namespace vmime {
 namespace utility {