diff --git a/modules/python/src2/typing_stubs_generation/predefined_types.py b/modules/python/src2/typing_stubs_generation/predefined_types.py
index c5f49b5122..df2fd3cc58 100644
--- a/modules/python/src2/typing_stubs_generation/predefined_types.py
+++ b/modules/python/src2/typing_stubs_generation/predefined_types.py
@@ -54,8 +54,12 @@ _PREDEFINED_TYPES = (
                             doc="Required length is 2"),
     AliasTypeNode.sequence_("Size2f", PrimitiveTypeNode.float_(),
                             doc="Required length is 2"),
-    AliasTypeNode.sequence_("Scalar", PrimitiveTypeNode.float_(),
-                            doc="Required length is at most 4"),
+    AliasTypeNode.union_(
+        "Scalar",
+        items=(SequenceTypeNode("Scalar", PrimitiveTypeNode.float_()),
+               PrimitiveTypeNode.float_()),
+        doc="Max sequence length is at most 4"
+    ),
     AliasTypeNode.sequence_("Point", PrimitiveTypeNode.int_(),
                             doc="Required length is 2"),
     AliasTypeNode.ref_("Point2i", "Point"),