diff --git a/sci-physics/mbdyn/mbdyn-1.7.3_p20210925.ebuild b/sci-physics/mbdyn/mbdyn-1.7.3_p20210925.ebuild
index 5750bf3dff..6fecb6acbb 100644
--- a/sci-physics/mbdyn/mbdyn-1.7.3_p20210925.ebuild
+++ b/sci-physics/mbdyn/mbdyn-1.7.3_p20210925.ebuild
@@ -223,11 +223,12 @@ src_configure() {
 		$(use_with sparse suitesparseqr)
 		$(use_with sparse umfpack)
 		$(use_with superlu)
-		$(use_with taucs)
 		$(use_with threads)
 		$(use_with y12)
 	)
 
+	use taucs && myconf+=( "--with-taucs" )
+
 	if ( use autodiff && use sparse ); then
 		myconf+=( "--enable-sparse-autodiff" )
 	else