diff --git a/src/pystencilssfg/context.py b/src/pystencilssfg/context.py
index 6d76b7e4f7d831a8b9cd0285327223cf87fdd58b..48156500887d89304f054e09c2e533f5053299f1 100644
--- a/src/pystencilssfg/context.py
+++ b/src/pystencilssfg/context.py
@@ -21,7 +21,7 @@ class SfgContext:
         self,
         header_file: SfgSourceFile,
         impl_file: SfgSourceFile | None,
-        c_interfacing: bool,
+        c_interfacing: bool = False,
         namespace: str | None = None,
         codestyle: CodeStyle | None = None,
         argv: Sequence[str] | None = None,