diff --git a/src/Makefile b/src/Makefile
index 70ac5ec3e4..aa692caa71 100755
--- a/src/Makefile
+++ b/src/Makefile
@@ -47,7 +47,7 @@ PACKAGE = asphere body class2 colloid coreshell dipole fld gpu granular kim \
 
 PACKUSER = user-atc user-awpmd user-cg-cmm user-colvars user-cuda \
 	   user-diffraction user-eff user-fep user-intel user-lb user-misc \
-	   user-molfile user-omp user-phonon user-qmmm user-quip \
+	   user-molfile user-omp user-phonon user-qmmm user-qtb user-quip \
 	   user-reaxc user-sph
 
 PACKLIB = gpu kim kokkos meam poems python reax voronoi \