diff --git a/travis/setup-php-extensions.sh b/travis/setup-php-extensions.sh
index 142d3cc242..0fcddb044f 100755
--- a/travis/setup-php-extensions.sh
+++ b/travis/setup-php-extensions.sh
@@ -58,7 +58,7 @@ fi
 phpenv config-rm xdebug.ini || true
 
 # memcached
-echo "extension = memcached.so" >> "$php_ini_file"
+register_php_extension memcached "$php_ini_file"
 
 # redis
 # Disabled redis for now as it causes travis to fail