diff --git a/code/D3MFImporter.cpp b/code/D3MFImporter.cpp
index 045138be1..32b87003a 100644
--- a/code/D3MFImporter.cpp
+++ b/code/D3MFImporter.cpp
@@ -44,8 +44,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <assimp/IOStream.hpp>
 #include <assimp/IOSystem.hpp>
 #include <assimp/DefaultLogger.hpp>
-#include <contrib/unzip/unzip.h>
-#include "irrXMLWrapper.h"
 #include "StringComparison.h"
 #include "StringUtils.h"
 
@@ -61,10 +59,12 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <assimp/ai_assert.h>
 
-#include "D3MFOpcPackage.h"
-
 #ifndef ASSIMP_BUILD_NO_3MF_IMPORTER
 
+#include "D3MFOpcPackage.h"
+#include <contrib/unzip/unzip.h>
+#include "irrXMLWrapper.h"
+
 namespace Assimp {
 namespace D3MF {
 
diff --git a/code/D3MFOpcPackage.cpp b/code/D3MFOpcPackage.cpp
index f01ca7e0f..2e63a346e 100644
--- a/code/D3MFOpcPackage.cpp
+++ b/code/D3MFOpcPackage.cpp
@@ -42,7 +42,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "D3MFOpcPackage.h"
 #include "Exceptional.h"
 
-#include <contrib/unzip/unzip.h>
 #include <assimp/IOStream.hpp>
 #include <assimp/IOSystem.hpp>
 #include <assimp/DefaultLogger.hpp>
@@ -57,6 +56,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef ASSIMP_BUILD_NO_3MF_IMPORTER
 
+#include <contrib/unzip/unzip.h>
+
 namespace Assimp {
 
 namespace D3MF {