diff --git a/man2/keyctl.2 b/man2/keyctl.2
index 93e03071f..6d0386c0e 100644
--- a/man2/keyctl.2
+++ b/man2/keyctl.2
@@ -2103,6 +2103,7 @@ main(int argc, char *argv[])
     char dbuf[256];
     char auth_key_payload[256];
     int akp_size;       /* Size of auth_key_payload */
+    int auth_key;
 
     fp = fopen("/tmp/key_instantiate.log", "w");
     if (fp == NULL)