diff --git a/modules/gdscript/gdscript_editor.cpp b/modules/gdscript/gdscript_editor.cpp
index 14566129154..693863ab38c 100644
--- a/modules/gdscript/gdscript_editor.cpp
+++ b/modules/gdscript/gdscript_editor.cpp
@@ -1612,7 +1612,7 @@ static bool _guess_expression_type(GDScriptParser::CompletionContext &p_context,
 						}
 					}
 
-					if (!found) {
+					if (!found && base.value.get_type() != Variant::NIL) {
 						found = _guess_method_return_type_from_base(c, base, call->function_name, r_type);
 					}
 				}