diff --git a/src/runner.ts b/src/runner.ts
index 0ef96358c4d1b2307b048725e53dc19eea1ad086..d433bf251980b68b0389b9ea48f9f5686b788c28 100644
--- a/src/runner.ts
+++ b/src/runner.ts
@@ -55,7 +55,8 @@ export class Runner {
 				}
 			};
 
-			let headerAsFlag = (path: string) => (path === "" ? [] : ["-I", path]);
+			let headerAsFlag = (path: string) =>
+				path === "" ? [] : ["-I", '"' + path + '"'];
 
 			// Todo: allow customizable flags
 			let execute = new vscode.ProcessExecution(