diff --git a/wallet/models.py b/wallet/models.py
index 1b75402..ad115de 100644
--- a/wallet/models.py
+++ b/wallet/models.py
@@ -320,7 +320,7 @@ class Pass(object):
     def _createSignature(self, manifest, certificate, key,
                          wwdr_certificate, password):
         openssl_cmd = [
-            'openssl',
+            '@openssl@',
             'smime',
             '-binary',
             '-sign',