diff --git a/tools/gpgkey2ssh.c b/tools/gpgkey2ssh.c
index 903fb5bd6..d22c5acf2 100644
--- a/tools/gpgkey2ssh.c
+++ b/tools/gpgkey2ssh.c
@@ -224,6 +224,8 @@ key_to_blob (unsigned char **blob, size_t *blob_n, const char *identifier, ...)
       assert (ret == 1);
     }
 
+  va_end (ap);
+
   blob_new_n = ftell (stream);
   rewind (stream);