diff --git a/src/vs/workbench/parts/debug/common/debugModel.ts b/src/vs/workbench/parts/debug/common/debugModel.ts
index d585e6276d86b7d42eda23c3c9b875cbc79cdcc7..16dd4a8a7da3c8e70a2094018f5677ab40eb6e28 100644
--- a/src/vs/workbench/parts/debug/common/debugModel.ts
+++ b/src/vs/workbench/parts/debug/common/debugModel.ts
@@ -560,6 +560,7 @@ export class Process implements IProcess {
 		let source = new Source(raw, this.getId());
 		if (this.sources.has(source.uri.toString())) {
 			source = this.sources.get(source.uri.toString());
+			source.raw = raw;
 		} else {
 			this.sources.set(source.uri.toString(), source);
 		}
diff --git a/src/vs/workbench/parts/debug/common/debugSource.ts b/src/vs/workbench/parts/debug/common/debugSource.ts
index a154158dc82e97e0fd05c63a74f75ad99187103b..22a60851431adf7ac0db848b781d1041e01422d5 100644
--- a/src/vs/workbench/parts/debug/common/debugSource.ts
+++ b/src/vs/workbench/parts/debug/common/debugSource.ts
@@ -19,7 +19,7 @@ export class Source {
 	public readonly uri: uri;
 	public available: boolean;
 
-	constructor(public readonly raw: DebugProtocol.Source, sessionId: string) {
+	constructor(public raw: DebugProtocol.Source, sessionId: string) {
 		if (!raw) {
 			this.raw = { name: UNKNOWN_SOURCE_LABEL };
 		}
@@ -110,4 +110,4 @@ export class Source {
 			processId
 		};
 	}
-}
\ No newline at end of file
+}