diff --git a/.travis.yml b/.travis.yml
index a80570e0e0..b731addc4e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -34,4 +34,7 @@ before_install:
 # programs.
 
 script:
+  - export OPENSSL_INCLUDE_DIR=$(brew --prefix openssl)/include
+  - export OPENSSL_LIB_DIR=$(brew --prefix openssl)/lib
+  - export DEP_OPENSSL_INCLUDE=$(brew --prefix openssl)/include
   - PKG_CONFIG_PATH=/usr/local/opt/icu4c/lib/pkgconfig cargo build --verbose && cargo test --no-run && target/debug/tex_outputs-???????????????? && target/debug/trip-????????????????