diff --git a/projects/suricata/build.sh b/projects/suricata/build.sh
index 1f4d4dfe72d2..1b6409f491f3 100755
--- a/projects/suricata/build.sh
+++ b/projects/suricata/build.sh
@@ -131,6 +131,11 @@ cat generic.dict >> $OUT/fuzz_applayerparserparse$branch.dict
 cat generic.dict >> $OUT/fuzz_sigpcap$branch.dict
 cat generic.dict >> $OUT/fuzz_sigpcap_aware$branch.dict
 
+df
+# clean to leave enough space for CIFuzz
+make clean
+df
+
 # build corpuses
 # default configuration file
 zip -r $OUT/fuzz_confyamlloadstring"$branch"_seed_corpus.zip suricata.yaml