diff --git a/site/docs/skylark/backward-compatibility.md b/site/docs/skylark/backward-compatibility.md
index 2dc81f500b1786..6b31bd468741e3 100644
--- a/site/docs/skylark/backward-compatibility.md
+++ b/site/docs/skylark/backward-compatibility.md
@@ -180,7 +180,7 @@ Likewise, the magic `REPOSITORY_NAME` variable is replaced by
 same flag.
 
 *   Flag: `--incompatible_package_name_is_a_function`
-*   Default: `true`
+*   Default: `false`
 
 
 ### FileType is deprecated
diff --git a/src/main/java/com/google/devtools/build/lib/packages/SkylarkSemanticsOptions.java b/src/main/java/com/google/devtools/build/lib/packages/SkylarkSemanticsOptions.java
index d38a808e882899..cb7430326c39f7 100644
--- a/src/main/java/com/google/devtools/build/lib/packages/SkylarkSemanticsOptions.java
+++ b/src/main/java/com/google/devtools/build/lib/packages/SkylarkSemanticsOptions.java
@@ -316,7 +316,7 @@ public class SkylarkSemanticsOptions extends OptionsBase implements Serializable
 
   @Option(
       name = "incompatible_package_name_is_a_function",
-      defaultValue = "true",
+      defaultValue = "false",
       documentationCategory = OptionDocumentationCategory.SKYLARK_SEMANTICS,
       effectTags = {OptionEffectTag.BUILD_FILE_SEMANTICS},
       metadataTags = {
diff --git a/src/main/java/com/google/devtools/build/lib/syntax/SkylarkSemantics.java b/src/main/java/com/google/devtools/build/lib/syntax/SkylarkSemantics.java
index 0b5aef5c972f59..2062ae17241ca0 100644
--- a/src/main/java/com/google/devtools/build/lib/syntax/SkylarkSemantics.java
+++ b/src/main/java/com/google/devtools/build/lib/syntax/SkylarkSemantics.java
@@ -127,7 +127,7 @@ public static Builder builderWithDefaults() {
           .incompatibleGenerateJavaCommonSourceJar(false)
           .incompatibleNewActionsApi(false)
           .incompatibleNoSupportToolsInActionInputs(false)
-          .incompatiblePackageNameIsAFunction(true)
+          .incompatiblePackageNameIsAFunction(false)
           .incompatibleRangeType(false)
           .incompatibleRemoveNativeGitRepository(false)
           .incompatibleRemoveNativeHttpArchive(false)