diff --git a/masm2c/gen.py b/masm2c/gen.py
index 92f812e..8b7946a 100644
--- a/masm2c/gen.py
+++ b/masm2c/gen.py
@@ -454,7 +454,8 @@ def isrelativejump(label: Expression) -> bool:
             and label.children[0].children[0].data == "dollar"
         )
 
-    def dump_globals(self):
+    def dump_globals(self) -> None:
+        """Dumps the global variables to a file."""
         from masm2c.proc import Proc
         name = f"{self._namespace.lower()}.list"
         logging.info(f" *** Generating globals listing {name}")