diff --git a/tools/warn/java_warn_patterns.py b/tools/warn/java_warn_patterns.py
index 7dfa866..3f5da9d 100644
--- a/tools/warn/java_warn_patterns.py
+++ b/tools/warn/java_warn_patterns.py
@@ -807,6 +807,8 @@
                 [r".*: warning: \[path\] bad path element .*\.jar"]),
     java_medium('Supported version from annotation processor',
                 [r".*: warning: Supported source version .+ from annotation processor"]),
+    java_medium('Schema export directory is not provided',
+                [r".*\.(java|kt):.*: warning: Schema export directory is not provided"]),
 ]
 
 compile_patterns(warn_patterns)