diff --git a/numba/core/codegen.py b/numba/core/codegen.py
index 324a999fbe3..e22fa89012e 100644
--- a/numba/core/codegen.py
+++ b/numba/core/codegen.py
@@ -220,7 +220,7 @@ def finalize(self):
         Finalization involves various stages of code optimization and
         linking.
         """
-        #require_global_compiler_lock()
+        require_global_compiler_lock()
 
         # Report any LLVM-related problems to the user
         self._codegen._check_llvm_bugs()