diff --git a/EInAPI.h b/EInAPI.h
index 22e255f..a27990d 100644
--- a/EInAPI.h
+++ b/EInAPI.h
@@ -191,6 +191,7 @@ EIN_EXPORT int  __stdcall EgtCreatePolygonFromSide( int nParentId, int nNumSides
                                                     const double ptFin[3], int nRefType) ;
 
 // GeomDB Create Surf
+EIN_EXPORT int  __stdcall EgtCreateSurfFlatRegion( int nParentId, int nNumId, const int nCrvIds[]) ;
 EIN_EXPORT int  __stdcall EgtCreateSurfTmBBox( int nParentId, const double ptMin[3], const double ptMax[3], int nRefType) ;
 EIN_EXPORT int  __stdcall EgtCreateSurfTmBox( int nParentId, const double ptIni[3], const double ptCross[3],
                                               const double ptDir[3], double dHeight, int nRefType) ;