diff --git a/django/utils/datetime_safe.py b/django/utils/datetime_safe.py
index 3cc375b4f6..ed8420eb8e 100644
--- a/django/utils/datetime_safe.py
+++ b/django/utils/datetime_safe.py
@@ -61,12 +61,12 @@ def _findall(text, substr):
     # Also finds overlaps
     sites = []
     i = 0
-    while 1:
-        j = text.find(substr, i)
-        if j == -1:
+    while True:
+        i = text.find(substr, i)
+        if i == -1:
             break
-        sites.append(j)
-        i = j + 1
+        sites.append(i)
+        i += 1
     return sites