diff --git a/tools/gn/command_clean.cc b/tools/gn/command_clean.cc
index 8903986..70def6d 100644
--- a/tools/gn/command_clean.cc
+++ b/tools/gn/command_clean.cc
@@ -35,7 +35,7 @@
     result.push_back('\n');
     if (line.empty())
       ++num_blank_lines;
-    if (num_blank_lines == 2)
+    if (num_blank_lines == 3)
       break;
   }