diff --git a/src/vs/workbench/parts/debug/electron-browser/debugService.ts b/src/vs/workbench/parts/debug/electron-browser/debugService.ts
index 1dc8572e809aaeaf8685d1c84c17a986c80b2fa7..923043c688aa6316efeda2e65ade8a4cc8503b8a 100644
--- a/src/vs/workbench/parts/debug/electron-browser/debugService.ts
+++ b/src/vs/workbench/parts/debug/electron-browser/debugService.ts
@@ -785,7 +785,7 @@ export class DebugService extends ee.EventEmitter implements debug.IDebugService
 
 
 		return this.session.setBreakpoints({ source: Source.toRawSource(modelUri, this.model), lines: breakpointsToSend.map(bp => bp.desiredLineNumber),
-			breakpoints: breakpointsToSend.map(bp => ({ line: bp.desiredLineNumber, expression: bp.condition })) }).then(response => {
+			breakpoints: breakpointsToSend.map(bp => ({ line: bp.desiredLineNumber, condition: bp.condition })) }).then(response => {
 
 			const data: {[id: string]: { line: number, verified: boolean } } = { };
 			for (let i = 0; i < breakpointsToSend.length; i++) {