diff --git a/database/Makefile b/database/Makefile
index 082ade76..32df51c8 100644
--- a/database/Makefile
+++ b/database/Makefile
@@ -1,14 +1,18 @@
 
 DATABASE_FILES = *.csv *.db *.json *.yaml
+TIMINGS_FILES = *.sdf
 
 clean-artix7-db:
 	rm -f $(addprefix artix7/,$(DATABASE_FILES))
+	rm -f $(addprefix artix7/timings/,$(TIMINGS_FILES))
 
 clean-kintex7-db:
 	rm -f $(addprefix kintex7/,$(DATABASE_FILES))
+	rm -f $(addprefix kintex7/timings/,$(TIMINGS_FILES))
 
 clean-zynq7-db:
 	rm -f $(addprefix zynq7/,$(DATABASE_FILES))
+	rm -f $(addprefix zynq7/timings/,$(TIMINGS_FILES))
 
 clean-db: clean-artix7-db clean-kintex7-db clean-zynq7-db
 	@true