diff --git a/flow-typed/autobind-decorator.js b/flow-typed/autobind-decorator.js
index ee94d8c722c..467cfc1b4bb 100644
--- a/flow-typed/autobind-decorator.js
+++ b/flow-typed/autobind-decorator.js
@@ -1,4 +1,3 @@
-// @flow
 declare module 'autobind-decorator' {
   declare module.exports: *
 }
diff --git a/flow-typed/electron.js b/flow-typed/electron.js
index 009e13a06d4..7515628a014 100644
--- a/flow-typed/electron.js
+++ b/flow-typed/electron.js
@@ -1,4 +1,3 @@
-// @flow
 declare module 'electron' {
   declare module.exports: {
     remote: *
diff --git a/flow-typed/mime-types.js b/flow-typed/mime-types.js
index 862c7cbda51..864ffd78c74 100644
--- a/flow-typed/mime-types.js
+++ b/flow-typed/mime-types.js
@@ -1,4 +1,3 @@
-// @flow
 declare module 'mime-types' {
   declare module.exports: *
 }
diff --git a/flow-typed/mkdirp.js b/flow-typed/mkdirp.js
new file mode 100644
index 00000000000..864ffd78c74
--- /dev/null
+++ b/flow-typed/mkdirp.js
@@ -0,0 +1,3 @@
+declare module 'mime-types' {
+  declare module.exports: *
+}