diff --git a/slither/slithir/operations/return_operation.py b/slither/slithir/operations/return_operation.py
index 21758d4d4a..2ef776b139 100644
--- a/slither/slithir/operations/return_operation.py
+++ b/slither/slithir/operations/return_operation.py
@@ -18,6 +18,11 @@ def __init__(self, values):
             else:
                 values = [values]
         else:
+            # Remove None
+            # Prior Solidity 0.5
+            # return (0,)
+            # was valid for returns(uint)
+            values = [v for v in values if not v is None]
             self._valid_value(values)
         super(Return, self).__init__()
         self._values = values