diff --git a/fuzzers/030-iob/Makefile b/fuzzers/030-iob/Makefile
index 3cc92f37..3c7a4289 100644
--- a/fuzzers/030-iob/Makefile
+++ b/fuzzers/030-iob/Makefile
@@ -3,7 +3,7 @@ SPECIMENS := $(addprefix build/specimen_,$(shell seq -f '%03.0f' $(N)))
 SPECIMENS_OK := $(addsuffix /OK,$(SPECIMENS))
 
 database: $(SPECIMENS_OK)
-	${XRAY_SEGMATCH} -o build/segbits_ioblx.db $(addsuffix /segdata_ioblm_[lr].txt,$(SPECIMENS))
+	${XRAY_SEGMATCH} -o build/segbits_ioblx.db $(addsuffix /segdata_liob33.txt,$(SPECIMENS))
 
 #pushdb:
 #	${XRAY_MERGEDB} ioblm_l build/segbits_ioblx.db