diff --git a/atomisticparsers/lammps/parser.py b/atomisticparsers/lammps/parser.py
index 77c2bbd8..3896d2c1 100644
--- a/atomisticparsers/lammps/parser.py
+++ b/atomisticparsers/lammps/parser.py
@@ -666,7 +666,7 @@ def str_op(val):
         self._quantities = [
             Quantity(
                 name,
-                r"\n\s*%s\s+([\w\. \/\#\-]+)(\&\n[\w\. \/\#\-]*)*" % name,
+                r"\n\s*%s\s+(?!.*\$\{)([${}\w\. \/\#\-]+)(\&\n[\w\. \/\#\-]*)*" % name,
                 str_operation=str_op,
                 comment="#",
                 repeats=True,