diff --git a/project.py b/project.py
index 9acf663..ed1e9ff 100644
--- a/project.py
+++ b/project.py
@@ -803,7 +803,7 @@ class Project:
                     if m is not None:
                         num_cells = int(m.group(1))
 
-        except IndexError:
+        except (IndexError, FileNotFoundError):
             logging.warning(f"couldn't open yosys cell report for cell checking {self}")
 
         return num_cells