diff --git a/builtins/2.7/math.pyi b/builtins/2and3/math.pyi
similarity index 100%
rename from builtins/2.7/math.pyi
rename to builtins/2and3/math.pyi
diff --git a/builtins/3/math.pyi b/builtins/3/math.pyi
deleted file mode 100644
index 15a212871..000000000
--- a/builtins/3/math.pyi
+++ /dev/null
@@ -1,95 +0,0 @@
-"""Stub file for the 'math' module."""
-# This is an autogenerated file. It serves as a starting point
-# for a more precise manual annotation of this module.
-# Feel free to edit the source below, but remove this header when you do.
-
-from typing import Any, List, Tuple, Dict, Generic
-
-def acos(*args, **kwargs) -> Any: ...
-
-def acosh(*args, **kwargs) -> Any: ...
-
-def asin(*args, **kwargs) -> Any: ...
-
-def asinh(*args, **kwargs) -> Any: ...
-
-def atan(*args, **kwargs) -> Any: ...
-
-def atan2(*args, **kwargs) -> float: ...
-
-def atanh(*args, **kwargs) -> Any: ...
-
-def ceil(*args, **kwargs) -> Any: ...
-
-def copysign(*args, **kwargs) -> float: ...
-
-def cos(*args, **kwargs) -> Any: ...
-
-def cosh(*args, **kwargs) -> Any: ...
-
-def degrees(*args, **kwargs) -> float: ...
-
-def erf(*args, **kwargs) -> float: ...
-
-def erfc(*args, **kwargs) -> float: ...
-
-def exp(*args, **kwargs) -> Any: ...
-
-def expm1(*args, **kwargs) -> Any: ...
-
-def fabs(*args, **kwargs) -> Any: ...
-
-def factorial(*args, **kwargs) -> long:
-    raise ValueError()
-
-def floor(*args, **kwargs) -> Any: ...
-
-def fmod(*args, **kwargs) -> float: ...
-
-def frexp(*args, **kwargs) -> tuple: ...
-
-def fsum(*args, **kwargs) -> float:
-    raise OverflowError()
-    raise ValueError()
-
-def gamma(*args, **kwargs) -> float: ...
-
-def hypot(*args, **kwargs) -> float: ...
-
-def isfinite(*args, **kwargs) -> bool: ...
-
-def isinf(*args, **kwargs) -> bool: ...
-
-def isnan(*args, **kwargs) -> bool: ...
-
-def ldexp(a: float, b) -> float:
-    raise TypeError()
-
-def lgamma(*args, **kwargs) -> float: ...
-
-def log(*args, **kwargs) -> float: ...
-
-def log10(*args, **kwargs) -> float: ...
-
-def log1p(*args, **kwargs) -> Any: ...
-
-def log2(*args, **kwargs) -> float: ...
-
-def modf(*args, **kwargs) -> tuple: ...
-
-def pow(*args, **kwargs) -> float: ...
-
-def radians(*args, **kwargs) -> float: ...
-
-def sin(*args, **kwargs) -> Any: ...
-
-def sinh(*args, **kwargs) -> Any: ...
-
-def sqrt(*args, **kwargs) -> Any: ...
-
-def tan(*args, **kwargs) -> Any: ...
-
-def tanh(*args, **kwargs) -> Any: ...
-
-def trunc(*args, **kwargs) -> Any:
-    raise TypeError()