diff --git a/ppf.py b/ppf.py
index 87ecee4..e7ced28 100755
--- a/ppf.py
+++ b/ppf.py
@@ -135,7 +135,7 @@ def is_usable_proxy(proxy):
 
 	if (A < 1 or A > 254) or \
 	(B > 255 or C > 255 or D > 255) or \
-	(A == 10 or A == 127 or A == 0) or \
+	(A == 10 or A == 127) or \
 	(A == 192 and B == 168) or \
 	(A == 172 and B >= 16 and B <= 31): return False
 	return True