diff --git a/types/yargs/index.d.ts b/types/yargs/index.d.ts
index ca02b9cf63..c32bcc0b11 100644
--- a/types/yargs/index.d.ts
+++ b/types/yargs/index.d.ts
@@ -5,6 +5,7 @@
 //                 Jeffery Grajkowski <https://github.com/pushplay>
 //                 Jeff Kenney <https://github.com/jeffkenney>
 //                 Jimi (Dimitris) Charalampidis <https://github.com/JimiC>
+//                 Teddy Cross <https://github.com/tkazec>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.2
 
@@ -191,8 +192,8 @@ declare namespace yargs {
 
         showCompletionScript(): Argv;
 
-        showhidden(option?: string | boolean): Argv;
-        showhidden(option: string, description?: string): Argv;
+        showHidden(option?: string | boolean): Argv;
+        showHidden(option: string, description?: string): Argv;
 
         showHelp(consoleLevel?: string): Argv;
 
diff --git a/types/yargs/yargs-tests.ts b/types/yargs/yargs-tests.ts
index d2d06e5bc6..d8b301dc1c 100644
--- a/types/yargs/yargs-tests.ts
+++ b/types/yargs/yargs-tests.ts
@@ -654,12 +654,12 @@ function Argv$hide() {
         .hide('a');
 }
 
-function Argv$showhidden() {
+function Argv$showHidden() {
     const ya = yargs
-        .showhidden()
-        .showhidden(true)
-        .showhidden('show-hidden')
-        .showhidden('show-hidden', 'Show hidden options');
+        .showHidden()
+        .showHidden(true)
+        .showHidden('show-hidden')
+        .showHidden('show-hidden', 'Show hidden options');
 }
 
 function Argv$scriptName() {