diff --git a/.gitignore b/.gitignore
index 87088474..dcd8ed7d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,6 +32,7 @@ profile.html
 /docs/site/*
 pyproject.lock
 /poetry.lock
+setup.py
 
 # editor
 
diff --git a/Makefile b/Makefile
index a3a3ef44..0540be28 100644
--- a/Makefile
+++ b/Makefile
@@ -23,7 +23,7 @@ setup: setup-python
 test:
 	@py.test --cov=pendulum --cov-config .coveragerc tests/ -sq
 
-release: wheels_x64 cp_wheels_x64 wheels_i686 cp_wheels_i686 wheel
+release: wheels_x64 cp_wheels_x64 wheel
 
 publish:
 	@poetry publish --no-build
diff --git a/pendulum/helpers.py b/pendulum/helpers.py
index 2d6c9e37..5085a38b 100644
--- a/pendulum/helpers.py
+++ b/pendulum/helpers.py
@@ -2,6 +2,7 @@
 
 import pendulum
 import os
+import struct
 
 from math import copysign
 from datetime import datetime, date, timedelta
@@ -11,7 +12,7 @@
 with_extensions = os.getenv("PENDULUM_EXTENSIONS", "1") == "1"
 
 try:
-    if not with_extensions:
+    if not with_extensions or struct.calcsize("P") == 4:
         raise ImportError()
 
     from ._extensions._helpers import (
diff --git a/pendulum/parsing/__init__.py b/pendulum/parsing/__init__.py
index 58f60a99..eef430d6 100644
--- a/pendulum/parsing/__init__.py
+++ b/pendulum/parsing/__init__.py
@@ -1,12 +1,19 @@
-import re
 import copy
+import os
+import re
+import struct
 
 from datetime import datetime, date, time
 from dateutil import parser
 
 from .exceptions import ParserError
 
+with_extensions = os.getenv("PENDULUM_EXTENSIONS", "1") == "1"
+
 try:
+    if not with_extensions or struct.calcsize("P") == 4:
+        raise ImportError()
+
     from ._iso8601 import parse_iso8601
 except ImportError:
     from .iso8601 import parse_iso8601