Description redacted.
--
MOS_MIGRATED_REVID=112394431
diff --git a/src/main/java/com/google/devtools/build/lib/packages/Package.java b/src/main/java/com/google/devtools/build/lib/packages/Package.java
index ce49383..5c04220 100644
--- a/src/main/java/com/google/devtools/build/lib/packages/Package.java
+++ b/src/main/java/com/google/devtools/build/lib/packages/Package.java
@@ -575,7 +575,7 @@
    * Gets the default header checking mode.
    */
   public String getDefaultHdrsCheck() {
-    return defaultHdrsCheck != null ? defaultHdrsCheck : "loose";
+    return defaultHdrsCheck != null ? defaultHdrsCheck : "strict";
   }
 
   /**