diff --git a/build/fbcode_builder/getdeps/builder.py b/build/fbcode_builder/getdeps/builder.py
index 17061953a..de562c4a7 100644
--- a/build/fbcode_builder/getdeps/builder.py
+++ b/build/fbcode_builder/getdeps/builder.py
@@ -64,7 +64,7 @@ class BuilderBase(object):
         env=None,
         use_cmd_prefix: bool = True,
         allow_fail: bool = False,
-    ):
+    ) -> int:
         if env:
             e = self.env.copy()
             e.update(env)
@@ -86,19 +86,19 @@ class BuilderBase(object):
             allow_fail=allow_fail,
         )
 
-    def _reconfigure(self, reconfigure) -> bool:
+    def _reconfigure(self, reconfigure: bool) -> bool:
         if self.build_dir is not None:
             if not os.path.isdir(self.build_dir):
                 os.makedirs(self.build_dir)
                 reconfigure = True
         return reconfigure
 
-    def prepare(self, install_dirs, reconfigure) -> None:
+    def prepare(self, install_dirs, reconfigure: bool) -> None:
         print("Preparing %s..." % self.manifest.name)
         reconfigure = self._reconfigure(reconfigure)
         self._prepare(install_dirs=install_dirs, reconfigure=reconfigure)
 
-    def build(self, install_dirs, reconfigure) -> None:
+    def build(self, install_dirs, reconfigure: bool) -> None:
         print("Building %s..." % self.manifest.name)
         reconfigure = self._reconfigure(reconfigure)
         self._prepare(install_dirs=install_dirs, reconfigure=reconfigure)
diff --git a/build/fbcode_builder/getdeps/envfuncs.py b/build/fbcode_builder/getdeps/envfuncs.py
index a9010db32..8ada5d24e 100644
--- a/build/fbcode_builder/getdeps/envfuncs.py
+++ b/build/fbcode_builder/getdeps/envfuncs.py
@@ -158,7 +158,7 @@ def tpx_path() -> str:
     return "xplat/testinfra/tpx/ctp.tpx"
 
 
-def path_search(env, exename, defval=None):
+def path_search(env, exename: str, defval=None):
     """Search for exename in the PATH specified in env.
     exename is eg: `ninja` and this function knows to append a .exe
     to the end on windows.