diff --git a/interpreter.py b/interpreter.py
index fc853fd14..63e299e97 100644
--- a/interpreter.py
+++ b/interpreter.py
@@ -1682,7 +1682,7 @@ class Interpreter():
             isinstance(value, str) or\
             isinstance(value, int) or \
             isinstance(value, list) or \
-            isinstance(value, File):
+            isinstance(value, mesonlib.File):
             return True
         return False