diff --git a/src/main/java/com/google/devtools/build/lib/rules/java/JavaOptions.java b/src/main/java/com/google/devtools/build/lib/rules/java/JavaOptions.java
index ac4a4b2e97160f..a86fa8ce7ee4bd 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/java/JavaOptions.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/java/JavaOptions.java
@@ -477,7 +477,7 @@ public ImportDepsCheckingLevelConverter() {
 
   @Option(
       name = "incompatible_disallow_resource_jars",
-      defaultValue = "false",
+      defaultValue = "true",
       documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
       effectTags = {OptionEffectTag.UNKNOWN},
       metadataTags = {