diff --git a/lib/curl_gssapi.c b/lib/curl_gssapi.c
index 6220bac078..8182ae7d0a 100644
--- a/lib/curl_gssapi.c
+++ b/lib/curl_gssapi.c
@@ -257,10 +257,10 @@ static OM_uint32 stub_gss_init_sec_context(
     }
 
     /* Token format: creds:target:type:padding */
-    used = curl_msnprintf(token, length, "%s:%.*s:%u:", creds,
+    used = curl_msnprintf(token, length, "%s:%.*s:%d:", creds,
                           (int)target_desc.length,
                           (const char *)target_desc.value,
-                          ctx->sent);
+                          (int)ctx->sent);
 
     gss_release_buffer(&minor_status, &target_desc);
   }