diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4fa92baf319e3fcfae64d09af83413b586106fdb..7fba034d833e484601ce1e7b08248cac399aa0fc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1462,4 +1462,5 @@ mark_as_advanced(GMSH_EXTRA_VERSION
                  ANN_INC ANN_LIB GMM_INC GMP_INC GMP_LIB MMG3D_INC MMG3D_LIB
                  TAUCS_INC TAUCS_LIB HDF5_LIB ACIS_LIB MED_LIB OCC_INC OCC_CONFIG_H
                  CGNS_INC SZ_LIB PETSC_LIBS SLEPC_INC SLEPC_INC2 SLEPC_LIB
-                 BISON FLEX MAKEINFO TEXI2PDF FLTK_CONFIG_SCRIPT)
+                 BISON FLEX MAKEINFO TEXI2PDF FLTK_CONFIG_SCRIPT
+                 GMSH_EXTERNAL_INCLUDE_DIRS GMSH_EXTERNAL_LIBRARIES)