diff --git a/Gulpfile.ts b/Gulpfile.ts
index 2e6081bea4a..74113b4b0c7 100644
--- a/Gulpfile.ts
+++ b/Gulpfile.ts
@@ -69,12 +69,15 @@ function exec(cmd: string, args: string[], complete: () => void = (() => {}), er
     console.log(`${cmd} ${args.join(" ")}`);
     // TODO (weswig): Update child_process types to add windowsVerbatimArguments to the type definition
     const subshellFlag = isWin ? "/c" : "-c";
-    const command = isWin ? [cmd, ...args] : [`${cmd} ${args.join(" ")}`];
+    const command = isWin ? [possiblyQuote(cmd), ...args] : [`${cmd} ${args.join(" ")}`];
     const ex = cp.spawn(isWin ? "cmd" : "/bin/sh", [subshellFlag, ...command], { stdio: "inherit", windowsVerbatimArguments: true } as any);
     ex.on("exit", (code) => code === 0 ? complete() : error(/*e*/ undefined, code));
     ex.on("error", error);
 }
 
+function possiblyQuote(cmd: string) {
+    return cmd.indexOf(" ") >= 0 ? `"${cmd}"` : cmd;
+}
 
 let useDebugMode = true;
 let host = cmdLineOptions["host"];