diff --git a/src/operator/combineAll.ts b/src/operator/combineAll.ts
index 3ea3f06566..da2a0dde1c 100644
--- a/src/operator/combineAll.ts
+++ b/src/operator/combineAll.ts
@@ -46,6 +46,5 @@ export function combineAll<R>(project?: (...values: Array<any>) => R): Observabl
 }
 
 export interface CombineAllSignature<T> {
-  (): Observable<T[]>;
   <R>(project?: (...values: Array<T>) => R): Observable<R>;
 }
diff --git a/src/operator/zipAll.ts b/src/operator/zipAll.ts
index 6565e36147..f71cfb462d 100644
--- a/src/operator/zipAll.ts
+++ b/src/operator/zipAll.ts
@@ -12,6 +12,5 @@ export function zipAll<T, R>(project?: (...values: Array<any>) => R): Observable
 }
 
 export interface ZipAllSignature<T> {
-  (): Observable<T[]>;
   <R>(project?: (...values: Array<T>) => R): Observable<R>;
 }