diff --git a/lib/techniques/blind/inference.py b/lib/techniques/blind/inference.py
index 071fe63a2..5419bd9cb 100644
--- a/lib/techniques/blind/inference.py
+++ b/lib/techniques/blind/inference.py
@@ -314,10 +314,10 @@ def bisection(payload, expression, length=None, charsetType=None, firstChar=None
                                         errMsg = "invalid character detected. retrying.."
                                         logger.error(errMsg)
 
-                                        conf.timeSec += 1
-
-                                        warnMsg = "increasing time delay to %d second%s " % (conf.timeSec, 's' if conf.timeSec > 1 else '')
-                                        logger.warn(warnMsg)
+                                        if kb.adjustTimeDelay is not ADJUST_TIME_DELAY.DISABLE:
+                                            conf.timeSec += 1
+                                            warnMsg = "increasing time delay to %d second%s " % (conf.timeSec, 's' if conf.timeSec > 1 else '')
+                                            logger.warn(warnMsg)
 
                                         if kb.adjustTimeDelay is ADJUST_TIME_DELAY.YES:
                                             dbgMsg = "turning off time auto-adjustment mechanism"