diff --git a/build-fuzz-corpus-multiple-sizes.sh b/build-fuzz-corpus-multiple-sizes.sh
index 1ba823c0..bed95a23 100755
--- a/build-fuzz-corpus-multiple-sizes.sh
+++ b/build-fuzz-corpus-multiple-sizes.sh
@@ -10,7 +10,7 @@ for size in "${@:2}"; do
   rm -rf "fuzz/corpus/fuzz_$1_pre_fresh_blood" || true
   find "fuzz/corpus/fuzz_$1" -type f -exec mv '{}' "fuzz/corpus/fuzz_$1_recombination_sources" ';' || true
   ./build-fuzz-corpus-multiple-restarts.sh "$1" "$size"
-  find "fuzz/corpus/fuzz_$1_recombination_sources" -type f -size "-${size}c" -exec mv '{}' "fuzz/corpus/fuzz_$1" ';'
+  find "fuzz/corpus/fuzz_$1_recombination_sources" -type f -size "-$((size + 1))c" -exec mv '{}' "fuzz/corpus/fuzz_$1" ';'
   ./fuzz-until-converged.sh "$1" "$size"
 done
 echo "$(date): FINISHED"
\ No newline at end of file