diff --git a/src/vs/workbench/parts/debug/electron-browser/debugService.ts b/src/vs/workbench/parts/debug/electron-browser/debugService.ts
index 3f1e43de48347492d70be87637539545fbefe22a..0bd32491e8ac41c38149dada5e6884650d1d0f2d 100644
--- a/src/vs/workbench/parts/debug/electron-browser/debugService.ts
+++ b/src/vs/workbench/parts/debug/electron-browser/debugService.ts
@@ -1138,7 +1138,7 @@ export class DebugService implements debug.IDebugService {
 
 			const source = process.sources.get(modelUri.toString());
 			const rawSource = source ? source.raw : { path: modelUri.scheme === 'file' || modelUri.scheme === debug.DEBUG_SCHEME ? paths.normalize(modelUri.fsPath, true) : modelUri.toString(), name: resources.basenameOrAuthority(modelUri) };
-			if (breakpointsToSend.length) {
+			if (breakpointsToSend.length && !rawSource.adapterData) {
 				rawSource.adapterData = breakpointsToSend[0].adapterData;
 			}