diff --git a/build-fuzz-corpus-multiple-sizes.sh b/build-fuzz-corpus-multiple-sizes.sh
index 658f771b..58d6f5b6 100755
--- a/build-fuzz-corpus-multiple-sizes.sh
+++ b/build-fuzz-corpus-multiple-sizes.sh
@@ -2,7 +2,7 @@
 mkdir "fuzz/corpus/fuzz_$1_recombination_sources" || true
 mv "fuzz/corpus/fuzz_$1/*" "fuzz/corpus/fuzz_$1_recombination_sources"
 for size in "${@:2}"; do
-  rm -rf "fuzz/corpus/fuzz_$1_pre_fresh_blood"
+  mv "fuzz/corpus/fuzz_$1_pre_fresh_blood/*" "fuzz/corpus/fuzz_$1_recombination_sources" || true
   ./build-fuzz-corpus-multiple-restarts.sh "$1" "$size"
   find "fuzz/corpus/fuzz_$1_pre_fresh_blood" -type -f -size "-${size}c" -exec mv '{}' "fuzz/corpus/fuzz_$1" ';'
   find "fuzz/corpus/fuzz_$1_recombination_sources" -type -f -size "-${size}c" -exec mv '{}' "fuzz/corpus/fuzz_$1" ';'