diff --git a/IPython/core/magics/execution.py b/IPython/core/magics/execution.py
index 9fabc43..d04ace8 100644
--- a/IPython/core/magics/execution.py
+++ b/IPython/core/magics/execution.py
@@ -507,6 +507,9 @@ python-profiler package from non-free.""")
         *two* back slashes (e.g. ``\\\\*``) to suppress expansions.
         To completely disable these expansions, you can use -G flag.
 
+        On Windows systems, the use of single quotes `'` when specifing 
+        a file is not supported. Use double quotes `"`.
+
         Options:
 
         -n