diff --git a/python_bitvavo_api/bitvavo.py b/python_bitvavo_api/bitvavo.py
index 2342a15..42aa5fd 100644
--- a/python_bitvavo_api/bitvavo.py
+++ b/python_bitvavo_api/bitvavo.py
@@ -96,6 +96,8 @@ def __init__(self, reset, bitvavo):
     threading.Thread.__init__(self)
 
   def waitForReset(self, waitTime):
+    if waitTime < 0.0:
+      waitTime = 0.001  # 1ms
     time.sleep(waitTime)
     if (time.time() < self.bitvavo.rateLimitReset):
       self.bitvavo.rateLimitRemaining = 1000