diff --git a/CHANGELOG.md b/CHANGELOG.md
index 830aa315..9e8e7cc9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,9 +1,11 @@
 # CHANGELOG
 
-## 3.15.1 - 2023-07-21
+## 3.15.1 - 2023-07-27
 
 - Add protection against some using `require 'oj/json`, an internal file.
 
+- Fixed non-json errors when in compat mode.
+
 ## 3.15.0 - 2023-06-02
 
 - Added `omit_null_byte` option when dumping.
diff --git a/ext/oj/extconf.rb b/ext/oj/extconf.rb
index 532f891b..b7466a6e 100644
--- a/ext/oj/extconf.rb
+++ b/ext/oj/extconf.rb
@@ -67,4 +67,4 @@
 
 create_makefile(File.join(extension_name, extension_name))
 
-`{make clean}`
+%x{make clean}