diff --git a/fuzzers/clb.mk b/fuzzers/clb.mk
index b3386a4b..a328b287 100644
--- a/fuzzers/clb.mk
+++ b/fuzzers/clb.mk
@@ -1,4 +1,6 @@
-N := 1
+N ?= 1
+DBFIXUP ?=
+
 SPECIMENS := $(addprefix build/specimen_,$(shell seq -f '%03.0f' $(N)))
 SPECIMENS_OK := $(addsuffix /OK,$(SPECIMENS))