diff --git a/build/npm/postinstall.js b/build/npm/postinstall.js
index 6df0b4ecb23..ea2d2d9a2dc 100644
--- a/build/npm/postinstall.js
+++ b/build/npm/postinstall.js
@@ -60,4 +60,11 @@ runtime "${runtime}"`;
 
 yarnInstall(`build`); // node modules required for build
 yarnInstall('test/smoke'); // node modules required for smoketest
-yarnInstallBuildDependencies(); // node modules for watching, specific to host node version, not electron
\ No newline at end of file
+yarnInstallBuildDependencies(); // node modules for watching, specific to host node version, not electron
+
+// Remove the windows process tree typings as this causes duplicate identifier errors in tsc builds
+const processTreeDts = path.join('node_modules', 'windows-process-tree', 'typings', 'windows-process-tree.d.ts');
+if (fs.existsSync(processTreeDts)) {
+	console.log('Removing windows-process-tree.d.ts');
+	fs.unlinkSync(processTreeDts);
+}
\ No newline at end of file
diff --git a/src/tsconfig.strictNullChecks.json b/src/tsconfig.strictNullChecks.json
index 503edf05fae..8f094f3baa0 100644
--- a/src/tsconfig.strictNullChecks.json
+++ b/src/tsconfig.strictNullChecks.json
@@ -701,7 +701,6 @@
 		"./vs/code/electron-browser/processExplorer/processExplorerMain.ts"
 	],
 	"exclude": [
-		"./typings/require-monaco.d.ts",
-		"./typings/windows-process-tree.d.ts"
+		"./typings/require-monaco.d.ts"
 	]
 }
\ No newline at end of file