diff --git a/src/frame.c b/src/frame.c
index 20e3394..e4cd565 100644
--- a/src/frame.c
+++ b/src/frame.c
@@ -240,7 +240,7 @@ ssize_t patty_ax25_frame_decode_control(patty_ax25_frame *frame,
             case PATTY_AX25_FRAME_XID:
             case PATTY_AX25_FRAME_TEST:
                 frame->type = c;
-                frame->pf   = decode_pf(frame->control, format);
+                frame->pf   = decode_pf(frame->control, PATTY_AX25_FRAME_NORMAL);
 
             default:
                 break;