diff --git a/fuzzers/051-imuxlout/Makefile b/fuzzers/051-imuxlout/Makefile
index 659a4235..0de1e703 100644
--- a/fuzzers/051-imuxlout/Makefile
+++ b/fuzzers/051-imuxlout/Makefile
@@ -4,16 +4,12 @@ SPECIMENS := $(addprefix specimen_,$(shell seq -f '%03.0f' $(N)))
 SPECIMENS_OK := $(addsuffix /OK,$(SPECIMENS))
 
 database: $(SPECIMENS_OK)
-	grep '^INT_L\.' todo.txt | sed 's/INT_L\./^INT./; s/$$/ ./;' > pattern_l.txt
-	grep '^INT_R\.' todo.txt | sed 's/INT_R\./^INT./; s/$$/ ./;' > pattern_r.txt
-	${XRAY_SEGMATCH} -m 5 -M 15 -o seg_int_l.segbits $(addsuffix /segdata_clbl[lm]_l_[0-9][0-9][0-9].txt,$(SPECIMENS))
-	${XRAY_SEGMATCH} -m 5 -M 15 -o seg_int_r.segbits $(addsuffix /segdata_clbl[lm]_r_[0-9][0-9][0-9].txt,$(SPECIMENS))
-	grep -f pattern_l.txt seg_int_l.segbits > filtered_seg_int_l.segbits
-	grep -f pattern_l.txt seg_int_r.segbits > filtered_seg_int_r.segbits
+	${XRAY_SEGMATCH} -m 5 -M 15 -o seg_int_l.segbits $(addsuffix /segdata_clbl[lm]_l.txt,$(SPECIMENS))
+	${XRAY_SEGMATCH} -m 5 -M 15 -o seg_int_r.segbits $(addsuffix /segdata_clbl[lm]_r.txt,$(SPECIMENS))
 
 pushdb:
-	${XRAY_MERGEDB} int_l filtered_seg_int_l.segbits
-	${XRAY_MERGEDB} int_r filtered_seg_int_r.segbits
+	${XRAY_MERGEDB} int_l seg_int_l.segbits
+	${XRAY_MERGEDB} int_r seg_int_r.segbits
 	${XRAY_DBFIXUP}
 
 $(SPECIMENS_OK): todo.txt