diff --git a/fuzzers/029-bram-fifo-config/Makefile b/fuzzers/029-bram-fifo-config/Makefile
index e3bf802a..8d186043 100644
--- a/fuzzers/029-bram-fifo-config/Makefile
+++ b/fuzzers/029-bram-fifo-config/Makefile
@@ -1,11 +1,11 @@
-N ?= 5
+N ?= 20
 
 include ../fuzzer.mk
 
 database: build/segbits_bramx.db
 
 build/segbits_bramx.rdb: $(SPECIMENS_OK)
-	${XRAY_SEGMATCH} -o build/segbits_bramx.rdb $(addsuffix /segdata_bram_[lr].txt,$(SPECIMENS))
+	${XRAY_SEGMATCH} -o build/segbits_bramx.rdb $(addsuffix /segdata_bram_[lr].txt,$(SPECIMENS)) -c 1
 
 build/segbits_bramx.db: build/segbits_bramx.rdb
 	${XRAY_DBFIXUP} --db-root build --zero-db bits.dbf \