diff --git a/stdlib/2.7/decimal.pyi b/stdlib/2.7/decimal.pyi
index 673a90477..f4d98d4d4 100644
--- a/stdlib/2.7/decimal.pyi
+++ b/stdlib/2.7/decimal.pyi
@@ -2,7 +2,7 @@
 #
 # NOTE: This dynamically typed stub was automatically generated by stubgen.
 
-from typing import Any
+from typing import Any, SupportsAbs, SupportsFloat, SupportsInt, SupportsRound
 
 ROUND_DOWN = ...  # type: Any
 ROUND_HALF_UP = ...  # type: Any
@@ -44,7 +44,7 @@ def setcontext(context): ...
 def getcontext(): ...
 def localcontext(ctx=None): ...
 
-class Decimal:
+class Decimal(SupportsAbs, SupportsFloat, SupportsInt, SupportsRound):
     def __new__(cls, value=..., context=None): ...
     @classmethod
     def from_float(cls, f): ...