diff --git a/lslopt/lslbasefuncs.py b/lslopt/lslbasefuncs.py
index f419e1e..5bcb1bf 100644
--- a/lslopt/lslbasefuncs.py
+++ b/lslopt/lslbasefuncs.py
@@ -1757,6 +1757,7 @@ def llUnescapeURL(s):
         c = s[i] # Second digit
         if c == u'%':
             ret += chr(v)
+            i += 1
             continue
         i += 1
         if u'0' <= c <= u'9' or u'A' <= c <= u'F' or u'a' <= c <= u'f':
diff --git a/testfuncs.py b/testfuncs.py
index aca0aad..8d9ce70 100644
--- a/testfuncs.py
+++ b/testfuncs.py
@@ -1302,7 +1302,7 @@ def do_tests():
 
     test('llUnescapeURL(u"%")', u'')
     test('llUnescapeURL(u"%%")', u'')
-    test('llUnescapeURL(u"%4%252Fabc")', u'\x40\x252Fabc')
+    test('llUnescapeURL(u"%4%252Fabc")', u'\x40252Fabc')
     test('llUnescapeURL(u"%%4%252Fabc")', u'\x04\x252Fabc')
     test('llEscapeURL(llUnescapeURL(u"%.44%25%%2Fa\u2190c"))', u'%044%25%02Fa%E2%86%90c')
     test('llEscapeURL(llUnescapeURL(u"%.44%25%%2Fa\u2190c%"))', u'%044%25%02Fa%E2%86%90c')