diff --git a/tests/Makefile.am b/tests/Makefile.am
index 11b2ea2f7fbfbea76bfcb1291be73445bf77adae..9ae62fe452fb771b6edaf24b3e9cb33835d028dd 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -30,7 +30,7 @@ MODFILES = \
 	steady_state/walsh1_old_ss.mod \
 	steady_state/walsh1_ssm.mod \
 	steady_state/walsh1_ssm_block.mod \
-	steady_state/multi_leads.mod
+	steady_state/multi_leads.mod \
 	steady_state_operator/standard.mod \
 	steady_state_operator/use_dll.mod \
 	steady_state_operator/block.mod \