diff --git a/src/extension/debugger/configuration/resolvers/attach.ts b/src/extension/debugger/configuration/resolvers/attach.ts
index 2d097f66..7536a63f 100644
--- a/src/extension/debugger/configuration/resolvers/attach.ts
+++ b/src/extension/debugger/configuration/resolvers/attach.ts
@@ -82,6 +82,11 @@ export class AttachConfigurationResolver extends BaseConfigurationResolver<Attac
         }
         if (!debugConfiguration.clientOS) {
             debugConfiguration.clientOS = getOSType() === OSType.Windows ? 'windows' : 'unix';
+            if (debugConfiguration.clientOS === 'windows') {
+                AttachConfigurationResolver.debugOption(debugOptions, DebugOptions.WindowsClient);
+            } else {
+                AttachConfigurationResolver.debugOption(debugOptions, DebugOptions.UnixClient);
+            }
         }
         if (debugConfiguration.showReturnValue) {
             AttachConfigurationResolver.debugOption(debugOptions, DebugOptions.ShowReturnValue);