diff --git a/comedi_calibrate/comedi_calibrate.c b/comedi_calibrate/comedi_calibrate.c
index 31e9bf7..bf6a1f7 100644
--- a/comedi_calibrate/comedi_calibrate.c
+++ b/comedi_calibrate/comedi_calibrate.c
@@ -227,7 +227,7 @@ ok:
 	if(device_status<STATUS_DONE){
 		printf("Warning: device may not be not fully calibrated due to "
 			"insufficient information.\n"
-			"Please file a bug report at http://bugs.comedi.org/ and attach this output.\n"
+			"Please file a bug report at https://bugs.comedi.org/ and attach this output.\n"
 			"This output will also allow comedi_calibrate to execute more\n"
 			"quickly in the future.\n");
 		if(verbose<1){