diff --git a/bi-map.d.ts b/bi-map.d.ts
index 7c7cf932..a25246a2 100644
--- a/bi-map.d.ts
+++ b/bi-map.d.ts
@@ -28,6 +28,9 @@ export default class BiMap<K, V> implements Iterable<[K, V]> {
   size: number;
   inverse: InverseMap<V, K>;
 
+  // Constructor
+  constructor();
+
   // Methods
   clear(): void;
   set(key: K, value: V): this;
diff --git a/kd-tree.d.ts b/kd-tree.d.ts
index a4adc666..d8a9515d 100644
--- a/kd-tree.d.ts
+++ b/kd-tree.d.ts
@@ -11,6 +11,9 @@ export default class KDTree<V> {
   size: number;
   visited: number;
 
+  // Constructor
+  private constructor(dimensions: number, build: any);
+
   // Methods
   nearestNeighbor(point: Array<number>): V;
   kNearestNeighbors(k: number, point: Array<number>): Array<V>;
diff --git a/linked-list.d.ts b/linked-list.d.ts
index a5034d11..94f3e2ec 100644
--- a/linked-list.d.ts
+++ b/linked-list.d.ts
@@ -7,6 +7,9 @@ export default class LinkedList<T> implements Iterable<T> {
   // Members
   size: number;
 
+  // Constructor
+  constructor();
+
   // Methods
   clear(): void;
   first(): T | undefined;
@@ -26,4 +29,4 @@ export default class LinkedList<T> implements Iterable<T> {
 
   // Statics
   static from<I>(iterable: Iterable<I> | {[key: string]: I}): LinkedList<I>;
-}
\ No newline at end of file
+}
diff --git a/multi-map.d.ts b/multi-map.d.ts
index e4c85435..b0320630 100644
--- a/multi-map.d.ts
+++ b/multi-map.d.ts
@@ -44,4 +44,4 @@ interface MultiMapConstructor {
 }
 
 declare const MultiMap: MultiMapConstructor;
-export default MultiMap;
\ No newline at end of file
+export default MultiMap;
diff --git a/multi-set.d.ts b/multi-set.d.ts
index 0e40bc40..d43385ca 100644
--- a/multi-set.d.ts
+++ b/multi-set.d.ts
@@ -8,6 +8,9 @@ export default class MultiSet<K> implements Iterable<K> {
   dimension: number;
   size: number;
 
+  // Constructor
+  constructor();
+
   // Methods
   clear(): void;
   add(key: K, count?: number): this;
diff --git a/queue.d.ts b/queue.d.ts
index 0056404f..3a932292 100644
--- a/queue.d.ts
+++ b/queue.d.ts
@@ -7,6 +7,9 @@ export default class Queue<T> implements Iterable<T> {
   // Members
   size: number;
 
+  // Constructor
+  constructor();
+
   // Methods
   clear(): void;
   enqueue(item: T): number;
diff --git a/stack.d.ts b/stack.d.ts
index acd98ba8..0f2e396f 100644
--- a/stack.d.ts
+++ b/stack.d.ts
@@ -7,6 +7,9 @@ export default class Stack<T> implements Iterable<T> {
   // Members
   size: number;
 
+  // Constructor
+  constructor();
+
   // Methods
   clear(): void;
   push(item: T): number;