diff --git a/.travis.yml b/.travis.yml
index 6d1591aa..f0f857b5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -27,7 +27,7 @@ script:
       cargo afl build
       timeout 10m cargo afl fuzz -i ../examples -o out target/debug/secsp-fuzzer > /dev/null || true
       cat out/fuzzer_stats
-      grep "unique_crashes *: 0" out/fuzzer_stats
+      grep "unique_crashes *: 0" out/fuzzer_stats || exit 1
       popd
     else
       echo "Building pull request, not running AFL."