diff --git a/EInAPI.h b/EInAPI.h
index 6434773..24a166b 100644
--- a/EInAPI.h
+++ b/EInAPI.h
@@ -113,6 +113,7 @@ EIN_EXPORT BOOL __stdcall EgtAdvancedImportIsEnabled( void) ;
 EIN_EXPORT BOOL __stdcall EgtAdvancedImport( const wchar_t* wsFilePath, double dLinToler) ;
 EIN_EXPORT BOOL __stdcall EgtExportDxf( int nId, const wchar_t* wsFilePath, int nFlag) ;
 EIN_EXPORT BOOL __stdcall EgtExportStl( int nId, const wchar_t* wsFilePath) ;
+EIN_EXPORT BOOL __stdcall EgtExport3MF( int nId, const wchar_t* wsFilePath) ;
 EIN_EXPORT BOOL __stdcall EgtExportSvg( int nId, const wchar_t* wsFilePath) ;
 
 // BeamManager
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 693103b..9fb0bde 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -120,6 +120,7 @@ EXE_EXPORT bool ExeAdvancedImportIsEnabled( void) ;
 EXE_EXPORT bool ExeAdvancedImport( const std::string& sFilePath, double dToler = 0.1) ;
 EXE_EXPORT bool ExeExportDxf( int nId, const std::string& sFilePath, int nFlag = 1) ;
 EXE_EXPORT bool ExeExportStl( int nId, const std::string& sFilePath) ;
+EXE_EXPORT bool ExeExport3MF( int nId, const std::string& sFilePath) ;
 EXE_EXPORT bool ExeExportSvg( int nId, const std::string& sFilePath, int nFilter = 393) ;
 
 // BeamManager