diff --git a/types/beats/beats-tests.ts b/types/beats/beats-tests.ts
index 32acdf0da5..00659af2e5 100644
--- a/types/beats/beats-tests.ts
+++ b/types/beats/beats-tests.ts
@@ -1,4 +1,4 @@
-import * as beats from 'beats';
+import beats = require('beats');
 
 const bins: beats.Bin[] = [
     { lo: 0, hi: 512, threshold: 0, decay: 0.005 },
diff --git a/types/beats/index.d.ts b/types/beats/index.d.ts
index f63530311e..e95f008c1f 100644
--- a/types/beats/index.d.ts
+++ b/types/beats/index.d.ts
@@ -5,9 +5,7 @@
 
 export = beats;
 
-type DetectFunction = (frequencies: Uint8Array | Float32Array | ReadonlyArray<number>, dt?: number) => Float32Array;
-
-declare function beats(bins: ReadonlyArray<beats.Bin>, minSeparation?: number): DetectFunction;
+declare function beats(bins: ReadonlyArray<beats.Bin>, minSeparation?: number): (frequencies: Uint8Array | Float32Array | ReadonlyArray<number>, dt?: number) => Float32Array;
 
 declare namespace beats {
     interface Bin {