diff --git a/tests/Makefile.am b/tests/Makefile.am
index 17e3376a0..5cf4f45f8 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -71,7 +71,8 @@ MODS = \
 	external_function/example1_1st_deriv_function_provided_dll.mod \
 	external_function/example1_no_deriv_functions_provided.mod \
 	external_function/example1_no_deriv_functions_provided_dll.mod \
-	seeds.mod
+	seeds.mod \
+	simul/example1.mod
 
 EXTRA_DIST = $(MODS) \
 	run_test_octave.m \