diff --git a/src/pdl/pdl_interpreter.py b/src/pdl/pdl_interpreter.py
index d88b23514..6b40843e6 100644
--- a/src/pdl/pdl_interpreter.py
+++ b/src/pdl/pdl_interpreter.py
@@ -2509,7 +2509,12 @@ def contribute(
         loc: Optional[PdlLocationType] = None,
         block: Optional[BlockType] = None,
     ) -> "FileAggregator":
-        print(f"{self.prefix}{result}", file=self.fp, end=self.suffix, flush=self.flush)
+        print(
+            f"{self.prefix}{stringify(result)}",
+            file=self.fp,
+            end=self.suffix,
+            flush=self.flush,
+        )
         return self
 
 
diff --git a/src/pdl/pdl_utils.py b/src/pdl/pdl_utils.py
index 6332950f7..1694ee82d 100644
--- a/src/pdl/pdl_utils.py
+++ b/src/pdl/pdl_utils.py
@@ -15,6 +15,7 @@
     get_sampling_defaults,
 )
 from .pdl_dumper import as_json, block_to_dict
+from .pdl_lazy import PdlLazy
 
 RefT = TypeVar("RefT")
 
@@ -64,6 +65,8 @@ async def to_async(value: ToAsyncT) -> ToAsyncT:
 
 
 def stringify(result):
+    if isinstance(result, PdlLazy):
+        result = result.result()
     if isinstance(result, str):
         s = result
     elif isinstance(result, FunctionBlock):