diff --git a/stubs/ibm-db/@tests/stubtest_allowlist.txt b/stubs/ibm-db/@tests/stubtest_allowlist.txt
deleted file mode 100644
index 587154085..000000000
--- a/stubs/ibm-db/@tests/stubtest_allowlist.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-# Bug:
-ibm_db. SQL_ATTR_TXN_ISOLATION
diff --git a/stubs/ibm-db/ibm_db.pyi b/stubs/ibm-db/ibm_db.pyi
index 9ba5a3b0d..9baf80d90 100644
--- a/stubs/ibm-db/ibm_db.pyi
+++ b/stubs/ibm-db/ibm_db.pyi
@@ -23,6 +23,7 @@ SQL_ATTR_QUERY_TIMEOUT: int
 SQL_ATTR_ROWCOUNT_PREFETCH: int
 SQL_ATTR_TRUSTED_CONTEXT_PASSWORD: int
 SQL_ATTR_TRUSTED_CONTEXT_USERID: int
+SQL_ATTR_TXN_ISOLATION: int
 SQL_ATTR_USE_TRUSTED_CONTEXT: int
 SQL_ATTR_XML_DECLARATION: int
 SQL_AUTOCOMMIT_OFF: int