diff --git a/reveal/reveal-tests.ts.tscparams b/reveal/reveal-tests.ts.tscparams
deleted file mode 100644
index e16c76dff..000000000
--- a/reveal/reveal-tests.ts.tscparams
+++ /dev/null
@@ -1 +0,0 @@
-""
diff --git a/reveal/reveal.d.ts b/reveal/reveal.d.ts
index bfe56bf0b..14393d650 100644
--- a/reveal/reveal.d.ts
+++ b/reveal/reveal.d.ts
@@ -10,7 +10,7 @@ interface RevealStatic {
     configure:(diff:RevealOptions)=>void;
 
     // Navigation
-    slide(h:number, v:number, f?:number, o?:number);
+    slide(h:number, v:number, f?:number, o?:number):void;
     left():void;
     right():void;
     up():void;
diff --git a/reveal/reveal.d.ts.tscparams b/reveal/reveal.d.ts.tscparams
deleted file mode 100644
index e16c76dff..000000000
--- a/reveal/reveal.d.ts.tscparams
+++ /dev/null
@@ -1 +0,0 @@
-""