diff --git a/lib/atc/Makefile.lammps.linalg b/lib/atc/Makefile.lammps.linalg
index f6890822c8..742b09f781 100644
--- a/lib/atc/Makefile.lammps.linalg
+++ b/lib/atc/Makefile.lammps.linalg
@@ -1,5 +1,5 @@
 # Settings that the LAMMPS build will import when this package library is used
 
 user-atc_SYSINC =
-user-atc_SYSLIB = -llinalg
+user-atc_SYSLIB = -llinalg -lgfortran
 user-atc_SYSPATH = -L../../lib/linalg