diff --git a/line_profiler/line_profiler.py b/line_profiler/line_profiler.py
index 4dd0bb08..d4b81edd 100755
--- a/line_profiler/line_profiler.py
+++ b/line_profiler/line_profiler.py
@@ -220,6 +220,7 @@ def add_module(self, mod):
 def is_ipython_kernel_cell(filename):
     """ Return True if a filename corresponds to a Jupyter Notebook cell
     """
+    filename = os.path.normpath(filename)
     return (
         filename.startswith('<ipython-input-') or
         filename.startswith(os.path.join(tempfile.gettempdir(), 'ipykernel_')) or