diff --git a/.circleci/config.yml b/.circleci/config.yml
index c9c7f2f..4b36c9d 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -11,7 +11,7 @@ jobs:
               g++ --version
               cd tests/
               ls
-              g++ -std=c++11 -O2 -Wall -Wextra -Werror check.cpp -o check
+              g++ -std=c++11 -O2 -Wall -Wextra -Werror -I../ check.cpp -o check
               git clone https://github.com/BurntSushi/toml-test.git
               cp check toml-test/tests/invalid
               cp check toml-test/tests/valid