diff --git a/pydal/__init__.py b/pydal/__init__.py
index 5cb73c057..b7022fc90 100644
--- a/pydal/__init__.py
+++ b/pydal/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "20200429.4"
+__version__ = "20200502.1"
 
 from .base import DAL
 from .objects import Field
diff --git a/pydal/validators.py b/pydal/validators.py
index 0667391c8..8548b6968 100644
--- a/pydal/validators.py
+++ b/pydal/validators.py
@@ -4455,7 +4455,7 @@ def validate(self, value, record_id=None):
 numberset = frozenset(b"0123456789")
 sym1set = frozenset(b"!@#$%^&*() ")
 sym2set = frozenset(b"~`-_=+[]{}\\|;:'\",.<>?/")
-otherset = frozenset(b"".join(chr(x).encode() for x in range(256)))
+otherset = frozenset(b"".join(chr(x) if PY2 else chr(r).encode() for x in range(256)))
 
 
 def calc_entropy(string):