diff --git a/stdlib/2.7/os/__init__.pyi b/stdlib/2.7/os/__init__.pyi
index 4d8e01407..40f5ed0a2 100644
--- a/stdlib/2.7/os/__init__.pyi
+++ b/stdlib/2.7/os/__init__.pyi
@@ -197,8 +197,22 @@ def kill(pid: int, sig: int) -> None: ...
 def killpg(pgid: int, sig: int) -> None: ...
 def nice(increment: int) -> int: ...
 
-# TODO: plock, popen*, spawn*, P_*
+# TODO: plock, popen*, P_*
 
+def spawnl(mode: int, path: AnyStr, arg0: AnyStr, *args: AnyStr) -> int: ...
+def spawnle(mode: int, path: AnyStr, arg0: AnyStr,
+            *args: Any) -> int: ... # Imprecise sig
+def spawnlp(mode: int, file: AnyStr, arg0: AnyStr,
+            *args: AnyStr) -> int: ...  # Unix only TODO
+def spawnlpe(mode: int, file: AnyStr, arg0: AnyStr, *args: Any) -> int:
+    ... # Imprecise signature; Unix only TODO
+def spawnv(mode: int, path: AnyStr, args: List[AnyStr]) -> int: ...
+def spawnve(mode: int, path: AnyStr, args: List[AnyStr],
+            env: Mapping[str, str]) -> int: ...
+def spawnvp(mode: int, file: AnyStr, args: List[AnyStr]) -> int: ...  # Unix only
+def spawnvpe(mode: int, file: AnyStr, args: List[AnyStr],
+             env: Mapping[str, str]) -> int:
+    ...  # Unix only
 def startfile(path: unicode, operation: str = ...) -> None: ... # Windows only
 def system(command: unicode) -> int: ...
 def times() -> Tuple[float, float, float, float, float]: ...