diff --git a/reasoning_gym/arithmetic/decimal_chain_sum.py b/reasoning_gym/arithmetic/decimal_chain_sum.py
index eaf5c7ea..da920c9d 100644
--- a/reasoning_gym/arithmetic/decimal_chain_sum.py
+++ b/reasoning_gym/arithmetic/decimal_chain_sum.py
@@ -152,3 +152,6 @@ class DecimalChainSumDataset(ProceduralDataset):
             return 1.0 if student_answer == oracle_answer else 0.01
         except (ValueError, TypeError, ArithmeticError):
             return 0.01
+
+
+register_dataset("decimal_chain_sum", DecimalChainSumDataset, DecimalChainSumConfig)