diff --git a/code/AssetLib/M3D/M3DExporter.h b/code/AssetLib/M3D/M3DExporter.h
index 95313baa2..1247114bb 100644
--- a/code/AssetLib/M3D/M3DExporter.h
+++ b/code/AssetLib/M3D/M3DExporter.h
@@ -46,10 +46,10 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef AI_M3DEXPORTER_H_INC
 #define AI_M3DEXPORTER_H_INC
 
+#ifndef ASSIMP_BUILD_NO_M3D_IMPORTER
 #ifndef ASSIMP_BUILD_NO_M3D_EXPORTER
 
 #include <assimp/types.h>
-//#include <assimp/material.h>
 #include <assimp/StreamWriter.h> // StreamWriterLE
 #include <assimp/Exceptional.h> // DeadlyExportError
 
@@ -60,8 +60,7 @@ struct aiNode;
 struct aiMaterial;
 struct aiFace;
 
-namespace Assimp
-{
+namespace Assimp {
     class IOSystem;
     class IOStream;
     class ExportProperties;
@@ -71,8 +70,7 @@ namespace Assimp
     // ---------------------------------------------------------------------
     /** Helper class to export a given scene to an M3D file. */
     // ---------------------------------------------------------------------
-    class M3DExporter
-    {
+    class M3DExporter {
     public:
         /// Constructor for a specific scene to export
         M3DExporter(const aiScene* pScene, const ExportProperties* pProperties);
@@ -89,6 +87,7 @@ namespace Assimp
     };
 }
 
+#endif // #ifndef ASSIMP_BUILD_NO_M3D_IMPORTER
 #endif // ASSIMP_BUILD_NO_M3D_EXPORTER
 
 #endif // AI_M3DEXPORTER_H_INC