diff --git a/src/gn/command_gen.cc b/src/gn/command_gen.cc
index c05ecd6..cf1851e 100644
--- a/src/gn/command_gen.cc
+++ b/src/gn/command_gen.cc
@@ -760,7 +760,7 @@
   // regeneration can be restarted if interrupted.
   if (command_line->HasSwitch(switches::kRegeneration)) {
     if (!commands::PrepareForRegeneration(&setup->build_settings())) {
-      return false;
+      return 1;
     }
   }