diff -up mathgl-8.0.1/src/prc.cpp.libharu2.4 mathgl-8.0.1/src/prc.cpp --- mathgl-8.0.1/src/prc.cpp.libharu2.4 2022-01-11 13:48:53.000000000 -0700 +++ mathgl-8.0.1/src/prc.cpp 2022-10-05 21:10:18.640050969 -0600 @@ -36,6 +36,7 @@ #include #include #include +#include #endif // MGL_HAVE_PDF @@ -959,7 +960,12 @@ void MGL_EXPORT mgl_write_prc(HMGL gr, c HPDF_U3D_SetDefault3DView(u3d, "DefaultView"); // Create annotation - annot = HPDF_Page_Create3DAnnot (page, rect, u3d ); + annot +#if HPDF_VERSION_ID >= 20400 + = HPDF_Page_Create3DAnnot (page, rect, HPDF_FALSE, HPDF_FALSE, u3d, NULL); +#else + = HPDF_Page_Create3DAnnot (page, rect, u3d ); +#endif // Enable toolbar HPDF_Dict action = (HPDF_Dict)HPDF_Dict_GetItem (annot, "3DA", HPDF_OCLASS_DICT);