diff --git a/tests/rigctl_parse.c b/tests/rigctl_parse.c
index a89f42bbf..a8ac5899a 100644
--- a/tests/rigctl_parse.c
+++ b/tests/rigctl_parse.c
@@ -489,6 +489,7 @@ static int scanfc(FILE *fin, const char *format, void *p)
             }
         }
 
+        if (ret < 1) rig_debug(RIG_DEBUG_TRACE, "%s: ret=%d\n", __func__, ret);
         return ret;
     }
     while (1);