diff --git a/llama_stack/providers/inline/scoring/llm_as_judge/scoring.py b/llama_stack/providers/inline/scoring/llm_as_judge/scoring.py
index dc562df1f..421997946 100644
--- a/llama_stack/providers/inline/scoring/llm_as_judge/scoring.py
+++ b/llama_stack/providers/inline/scoring/llm_as_judge/scoring.py
@@ -25,7 +25,7 @@ from llama_stack.providers.utils.common.data_schema_validator import (
 from .config import LlmAsJudgeScoringConfig
 from .scoring_fn.llm_as_judge_scoring_fn import LlmAsJudgeScoringFn
 
-LLM_JUDGE_FNS = [LlmAsJudgeScoringFn]
+LLM_JUDGE_FN = LlmAsJudgeScoringFn
 
 
 class LlmAsJudgeScoringImpl(
@@ -46,11 +46,10 @@ class LlmAsJudgeScoringImpl(
         self.scoring_fn_id_impls = {}
 
     async def initialize(self) -> None:
-        for fn in LLM_JUDGE_FNS:
-            impl = fn(inference_api=self.inference_api)
-            for fn_defs in impl.get_supported_scoring_fn_defs():
-                self.scoring_fn_id_impls[fn_defs.identifier] = impl
-                self.llm_as_judge_fn = impl
+        impl = LLM_JUDGE_FN(inference_api=self.inference_api)
+        for fn_defs in impl.get_supported_scoring_fn_defs():
+            self.scoring_fn_id_impls[fn_defs.identifier] = impl
+            self.llm_as_judge_fn = impl
 
     async def shutdown(self) -> None: ...
 
@@ -67,7 +66,8 @@ class LlmAsJudgeScoringImpl(
         return scoring_fn_defs_list
 
     async def register_scoring_function(self, function_def: ScoringFn) -> None:
-        raise NotImplementedError("Register scoring function not implemented yet")
+        self.llm_as_judge_fn.register_scoring_fn_def(function_def)
+        # raise NotImplementedError("Register scoring function not implemented yet")
 
     async def score_batch(
         self,