diff --git a/safaribooks.py b/safaribooks.py
index 4c6a2f7..2163223 100644
--- a/safaribooks.py
+++ b/safaribooks.py
@@ -660,9 +660,8 @@ class SafariBooks:
 
     @staticmethod
     def escape_dirname(dirname, clean_space=False):
-        if ":" in dirname:
-            if dirname.index(":") > 30:
-                dirname = dirname.split(":")[0]
+        if ":" in dirname and dirname.index(":") > 15:
+            dirname = dirname.split(":")[0]
 
         for ch in ['\\', '/', '<', '>', '`', '\'', '"', '*', '?', '|']:
             if ch in dirname: