diff --git a/node/node-0.10.d.ts b/node/node-0.10.d.ts
index a4cd5b1a6b..ba170e864d 100644
--- a/node/node-0.10.d.ts
+++ b/node/node-0.10.d.ts
@@ -176,7 +176,7 @@ declare module NodeJS {
                 visibility: string;
             };
         };
-        kill(pid: number, signal?: string): void;
+        kill(pid:number, signal?: string|number): void;
         pid: number;
         title: string;
         arch: string;
diff --git a/node/node-0.11.d.ts b/node/node-0.11.d.ts
index 05aee911de..b05e53494e 100644
--- a/node/node-0.11.d.ts
+++ b/node/node-0.11.d.ts
@@ -176,7 +176,7 @@ declare module NodeJS {
                 visibility: string;
             };
         };
-        kill(pid: number, signal?: string): void;
+        kill(pid:number, signal?: string|number): void;
         pid: number;
         title: string;
         arch: string;
diff --git a/node/node-0.12.d.ts b/node/node-0.12.d.ts
index 11fd92d245..39f0aa37a9 100644
--- a/node/node-0.12.d.ts
+++ b/node/node-0.12.d.ts
@@ -256,7 +256,7 @@ declare module NodeJS {
                 visibility: string;
             };
         };
-        kill(pid: number, signal?: string): void;
+        kill(pid:number, signal?: string|number): void;
         pid: number;
         title: string;
         arch: string;
diff --git a/node/node-0.8.8.d.ts b/node/node-0.8.8.d.ts
index 1972e0cdcf..ea56c73064 100644
--- a/node/node-0.8.8.d.ts
+++ b/node/node-0.8.8.d.ts
@@ -150,7 +150,7 @@ interface NodeProcess extends EventEmitter {
         visibility: string;
     };
     };
-    kill(pid: number, signal?: string): void;
+    kill(pid:number, signal?: string|number): void;
     pid: number;
     title: string;
     arch: string;
diff --git a/node/node.d.ts b/node/node.d.ts
index 06c4bb9600..449583a303 100644
--- a/node/node.d.ts
+++ b/node/node.d.ts
@@ -256,7 +256,7 @@ declare module NodeJS {
                 visibility: string;
             };
         };
-        kill(pid: number, signal?: string): void;
+        kill(pid:number, signal?: string|number): void;
         pid: number;
         title: string;
         arch: string;