diff --git a/types/cross-spawn/cross-spawn-tests.ts b/types/cross-spawn/cross-spawn-tests.ts
index f6dac4ea72..4f25577a0b 100644
--- a/types/cross-spawn/cross-spawn-tests.ts
+++ b/types/cross-spawn/cross-spawn-tests.ts
@@ -12,8 +12,8 @@ const r1: Error | undefined = spawn.sync('foo').error;
 const r2: string[] = spawn.sync('foo').output;
 const r3: Buffer = spawn.sync('foo').stdout;
 const r4: Buffer = spawn.sync('foo').stderr;
-const r5: number = spawn.sync('foo').status;
-const r6: string = spawn.sync('foo').signal;
+const r5: number | null = spawn.sync('foo').status;
+const r6: string | null = spawn.sync('foo').signal;
 const r7: string = spawn.sync('foo', {encoding: 'utf8'}).stdout;
 
 spawn.sync('foo', ['bar']);
diff --git a/types/node/child_process.d.ts b/types/node/child_process.d.ts
index 20c4f4cc97..f26a6385c2 100644
--- a/types/node/child_process.d.ts
+++ b/types/node/child_process.d.ts
@@ -310,8 +310,8 @@ declare module "child_process" {
         output: string[];
         stdout: T;
         stderr: T;
-        status: number;
-        signal: string;
+        status: number | null;
+        signal: string | null;
         error?: Error;
     }
     function spawnSync(command: string): SpawnSyncReturns<Buffer>;
diff --git a/types/node/v10/child_process.d.ts b/types/node/v10/child_process.d.ts
index 442e8ae654..125b275931 100644
--- a/types/node/v10/child_process.d.ts
+++ b/types/node/v10/child_process.d.ts
@@ -292,8 +292,8 @@ declare module "child_process" {
         output: string[];
         stdout: T;
         stderr: T;
-        status: number;
-        signal: string;
+        status: number | null;
+        signal: string | null;
         error?: Error;
     }
     function spawnSync(command: string): SpawnSyncReturns<Buffer>;
diff --git a/types/node/v11/child_process.d.ts b/types/node/v11/child_process.d.ts
index 20c4f4cc97..f26a6385c2 100644
--- a/types/node/v11/child_process.d.ts
+++ b/types/node/v11/child_process.d.ts
@@ -310,8 +310,8 @@ declare module "child_process" {
         output: string[];
         stdout: T;
         stderr: T;
-        status: number;
-        signal: string;
+        status: number | null;
+        signal: string | null;
         error?: Error;
     }
     function spawnSync(command: string): SpawnSyncReturns<Buffer>;