diff --git a/freqtrade/freqtradebot.py b/freqtrade/freqtradebot.py
index c6d3d0f44..3f7eab27a 100644
--- a/freqtrade/freqtradebot.py
+++ b/freqtrade/freqtradebot.py
@@ -511,7 +511,7 @@ class FreqtradeBot:
                         trade.pair.startswith(exectrade['fee']['currency'])):
                     fee_abs += exectrade['fee']['cost']
 
-        if not isclose(amount, order_amount, rel_tol=constants.MATH_CLOSE_PREC):
+        if not isclose(amount, order_amount, abs_tol=constants.MATH_CLOSE_PREC):
             logger.warning(f"Amount {amount} does not match amount {trade.amount}")
             raise OperationalException("Half bought? Amounts don't match")
         real_amount = amount - fee_abs
@@ -536,7 +536,7 @@ class FreqtradeBot:
             # Try update amount (binance-fix)
             try:
                 new_amount = self.get_real_amount(trade, order)
-                if not isclose(order['amount'], new_amount, rel_tol=constants.MATH_CLOSE_PREC):
+                if not isclose(order['amount'], new_amount, abs_tol=constants.MATH_CLOSE_PREC):
                     order['amount'] = new_amount
                     # Fee was applied, so set to 0
                     trade.fee_open = 0
diff --git a/tests/test_freqtradebot.py b/tests/test_freqtradebot.py
index dd535a0b0..ee28f2e58 100644
--- a/tests/test_freqtradebot.py
+++ b/tests/test_freqtradebot.py
@@ -3277,7 +3277,7 @@ def test_get_real_amount_wrong_amount_rounding(default_conf, trades_for_order, b
 
     # Amount changes by fee amount.
     assert isclose(freqtrade.get_real_amount(trade, limit_buy_order), amount - (amount * 0.001),
-                   rel_tol=MATH_CLOSE_PREC,)
+                   abs_tol=MATH_CLOSE_PREC,)
 
 
 def test_get_real_amount_invalid(default_conf, trades_for_order, buy_order_fee, mocker):