diff --git a/dataset/GitHub_Java/bazelbuild.bazel/src/main/java/com/google/devtools/build/lib/packages/StarlarkSemanticsOptions.java b/dataset/GitHub_Java/bazelbuild.bazel/src/main/java/com/google/devtools/build/lib/packages/StarlarkSemanticsOptions.java
index cce394667af..56b64015b25 100644
--- a/dataset/GitHub_Java/bazelbuild.bazel/src/main/java/com/google/devtools/build/lib/packages/StarlarkSemanticsOptions.java
+++ b/dataset/GitHub_Java/bazelbuild.bazel/src/main/java/com/google/devtools/build/lib/packages/StarlarkSemanticsOptions.java
@@ -140,9 +140,11 @@ public class StarlarkSemanticsOptions extends OptionsBase implements Serializabl
               + "debugging.")
   public boolean experimentalPlatformsApi;
 
+  // TODO(cparsons): Resolve and finalize the transition() API. The transition implementation
+  // function should accept two mandatory parameters, 'settings' and 'attr'.
   @Option(
       name = "experimental_starlark_config_transitions",
-      defaultValue = "true",
+      defaultValue = "false",
       documentationCategory = OptionDocumentationCategory.STARLARK_SEMANTICS,
       effectTags = {OptionEffectTag.LOADING_AND_ANALYSIS},
       metadataTags = {OptionMetadataTag.EXPERIMENTAL},
diff --git a/dataset/GitHub_Java/bazelbuild.bazel/src/main/java/com/google/devtools/build/lib/syntax/StarlarkSemantics.java b/dataset/GitHub_Java/bazelbuild.bazel/src/main/java/com/google/devtools/build/lib/syntax/StarlarkSemantics.java
index 8412a5114d9..52c703af04f 100644
--- a/dataset/GitHub_Java/bazelbuild.bazel/src/main/java/com/google/devtools/build/lib/syntax/StarlarkSemantics.java
+++ b/dataset/GitHub_Java/bazelbuild.bazel/src/main/java/com/google/devtools/build/lib/syntax/StarlarkSemantics.java
@@ -225,7 +225,7 @@ public static Builder builderWithDefaults() {
           .experimentalGoogleLegacyApi(false)
           .experimentalJavaCommonCreateProviderEnabledPackages(ImmutableList.of())
           .experimentalPlatformsApi(false)
-          .experimentalStarlarkConfigTransitions(true)
+          .experimentalStarlarkConfigTransitions(false)
           .experimentalStarlarkUnusedInputsList(false)
           .incompatibleBzlDisallowLoadAfterStatement(true)
           .incompatibleDepsetIsNotIterable(false)