diff --git a/bin/steps/cryptography b/bin/steps/cryptography
index 2cb3bac429394d8e2518b98a6fc311b9083443b8..5134bb0313e9d769074839c58b07d945c85d261d 100755
--- a/bin/steps/cryptography
+++ b/bin/steps/cryptography
@@ -20,7 +20,7 @@ source $BIN_DIR/utils
 bpwatch start libffi_install
 
 # If pylibmc exists within requirements, use vendored cryptography.
-if (pip-grep -s requirements.txt bcrypt cffi cryptography &> /dev/null) then
+if (pip-grep -s requirements.txt bcrypt cffi cryptography pyOpenSSL &> /dev/null) then
 
   if [ -d ".heroku/vendor/lib/libffi-3.1.1" ]; then
     export LIBFFI=$(pwd)/vendor