diff --git a/pycgtool/frame.py b/pycgtool/frame.py
index 53578c353295de1c26a6906131c7b626bd438a2b..69c28476aa4042f85ba258ae6cca0d3a4c5a6e05 100644
--- a/pycgtool/frame.py
+++ b/pycgtool/frame.py
@@ -18,9 +18,10 @@ np.seterr(all="raise")
 
 
 try:
-    raise FileNotFoundError
-except FileNotFoundError:
-    pass
+    try:
+        raise FileNotFoundError
+    except FileNotFoundError:
+        pass
 except NameError:
     class FileNotFoundError(OSError):
         pass