diff --git a/.travis.yml b/.travis.yml
index 7df1431a..2b056d10 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ os:
 - linux
 env:
   global:
-    - FEATURES="tlsv1_2 tlsv1_1 dtlsv1 dtlsv1_2 sslv2 aes_xts npn alpn"
+    - FEATURES="tlsv1_2 tlsv1_1 dtlsv1 dtlsv1_2 sslv2 aes_xts npn alpn aes_ctr"
 before_install:
 - (test $TRAVIS_OS_NAME == "osx" || ./openssl/test/build.sh)
 before_script: