1 files changed, 2 insertions, 1 deletions
diff --git a/.travis.yml b/.travis.yml
index fca9a9f..46ce91e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -58,4 +58,5 @@ after_success:
   - cd 4.9
   - ls
   - cd include
-  - ls
-\ No newline at end of file
+  - ls
+  - gcc -E - <<< '#include<stddef.h>'
+\ No newline at end of file