diff --git a/src/Mod/Fem/femtools/ccxtools.py b/src/Mod/Fem/femtools/ccxtools.py
index e87648c153..5f26c6d440 100644
--- a/src/Mod/Fem/femtools/ccxtools.py
+++ b/src/Mod/Fem/femtools/ccxtools.py
@@ -1023,7 +1023,7 @@ class FemToolsCcx(QtCore.QRunnable, QtCore.QObject):
             nonpositive_jacobian_elements = sorted(nonpositive_jacobian_elements)
             nonpositive_jacobian_elenodes = sorted(nonpositive_jacobian_elenodes)
             command_for_nonposjacnodes = (
-                'nonpositive_jacobian_elenodes = '
+                'nonpositive_jacobian_elenodes = {}'
                 .format(nonpositive_jacobian_elenodes)
             )
             command_to_highlight = (