diff --git a/src/backend/commands/extension.c b/src/backend/commands/extension.c
index b1509cc505d..02ff4a9a7fb 100644
--- a/src/backend/commands/extension.c
+++ b/src/backend/commands/extension.c
@@ -222,7 +222,7 @@ get_extension_name(Oid ext_oid)
  *
  * Returns InvalidOid if no such extension.
  */
-static Oid
+Oid
 get_extension_schema(Oid ext_oid)
 {
 	Oid			result;
diff --git a/src/include/commands/extension.h b/src/include/commands/extension.h
index 9f475044916..74ae3913958 100644
--- a/src/include/commands/extension.h
+++ b/src/include/commands/extension.h
@@ -47,6 +47,7 @@ extern ObjectAddress ExecAlterExtensionContentsStmt(AlterExtensionContentsStmt *
 
 extern Oid	get_extension_oid(const char *extname, bool missing_ok);
 extern char *get_extension_name(Oid ext_oid);
+extern Oid	get_extension_schema(Oid ext_oid);
 extern bool extension_file_exists(const char *extensionName);
 
 extern ObjectAddress AlterExtensionNamespace(const char *extensionName, const char *newschema,