diff --git a/hdlc_rec.c b/hdlc_rec.c
index e71ef9a..407ec4c 100644
--- a/hdlc_rec.c
+++ b/hdlc_rec.c
@@ -666,7 +666,7 @@ int hdlc_rec_data_detect_any (int chan)
 	    text_color_set(DW_COLOR_ERROR);
 	    dw_printf ("Error opening %s to check TXINH.\n", stemp);
 	    dw_printf ("%s\n", strerror(e));
-	    return busy;
+	    return (busy != 0);
 	  }
 
 	  char vtemp[2];