diff --git a/.travis.yml b/.travis.yml
index f0f857b5..92428157 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,6 +23,7 @@ script:
   - |
     if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then
       pushd secsp_fuzzer/
+      export RUSTFLAGS='-C codegen-units=1'
       cargo install afl
       cargo afl build
       timeout 10m cargo afl fuzz -i ../examples -o out target/debug/secsp-fuzzer > /dev/null || true