diff --git a/plugin/core/signature_help.py b/plugin/core/signature_help.py
index 82f8f022f..91b3cb269 100644
--- a/plugin/core/signature_help.py
+++ b/plugin/core/signature_help.py
@@ -169,7 +169,7 @@ def _parameter_documentation(self, view: sublime.View, signature: SignatureInfor
         if not parameters:
             return None
         try:
-            active_parameter = cast(Uint,signature.get("activeParameter"))
+            active_parameter = cast(Uint, signature.get("activeParameter"))
             parameter = parameters[active_parameter or self._active_parameter_index]
         except IndexError:
             return None