diff --git a/checker/BUILD.bazel b/checker/BUILD.bazel
index 052af994d..5fa3c6c05 100644
--- a/checker/BUILD.bazel
+++ b/checker/BUILD.bazel
@@ -39,6 +39,7 @@ java_library(
 
 java_library(
     name = "checker_legacy_environment",
+    deprecation = "See go/cel-java-migration-guide. Please use CEL-Java Fluent APIs //compiler instead",
     exports = ["//checker/src/main/java/dev/cel/checker:checker_legacy_environment"],
 )