diff --git a/common.mk b/common.mk
index 16afa6f6..f93e44a6 100644
--- a/common.mk
+++ b/common.mk
@@ -78,7 +78,7 @@ $(output_dir)/%.run: $(output_dir)/% $(sim)
 	$(sim) +max-cycles=$(timeout_cycles) $< && touch $@
 
 $(output_dir)/%.out: $(output_dir)/% $(sim)
-	$(sim) +verbose +max-cycles=$(timeout_cycles) $< 3>&1 1>&2 2>&3 | spike-dasm > $@
+	$(sim) +permissive +verbose +max-cycles=$(timeout_cycles) +permissive-off $< 3>&1 1>&2 2>&3 | spike-dasm > $@
 
 #########################################################################################
 # include build/project specific makefrags made from the generator
diff --git a/sims/verisim/Makefile b/sims/verisim/Makefile
index 7de100d8..485b2357 100644
--- a/sims/verisim/Makefile
+++ b/sims/verisim/Makefile
@@ -78,7 +78,7 @@ $(sim_debug): $(model_mk_debug)
 	$(MAKE) VM_PARALLEL_BUILDS=1 -C $(build_dir)/$(long_name).debug -f V$(VLOG_MODEL).mk
 
 #########################################################################################
-# create a vcs vpd rule
+# create a verisim vpd rule
 #########################################################################################
 $(output_dir)/%.vpd: $(output_dir)/% $(sim_debug)
 	rm -f $@.vcd && mkfifo $@.vcd