diff --git a/litellm/tests/test_rules.py b/litellm/tests/test_rules.py
index 7e7a984a9..0997143bf 100644
--- a/litellm/tests/test_rules.py
+++ b/litellm/tests/test_rules.py
@@ -127,3 +127,14 @@ def test_post_call_rule_streaming():
         print(type(e))
         print(vars(e))
         assert e.message == "This violates LiteLLM Proxy Rules. Response too short"
+
+
+def test_post_call_processing_error_async_response():
+    response = asyncio.run(
+        acompletion(
+            model="command-nightly",  # Just used as an example
+            messages=[{"content": "Hello, how are you?", "role": "user"}],
+            api_base="https://openai-proxy.berriai.repl.co",  # Just used as an example
+            custom_llm_provider="openai",
+        )
+    )
diff --git a/litellm/utils.py b/litellm/utils.py
index ee8c34a62..d31bed6cb 100644
--- a/litellm/utils.py
+++ b/litellm/utils.py
@@ -2465,6 +2465,14 @@ def client(original_function):
             )
             raise e
 
+    def check_coroutine(value) -> bool:
+        if inspect.iscoroutine(value):
+            return True
+        elif inspect.iscoroutinefunction(value):
+            return True
+        else:
+            return False
+
     def post_call_processing(original_response, model):
         try:
             if original_response is None:
@@ -2475,11 +2483,15 @@ def client(original_function):
                     call_type == CallTypes.completion.value
                     or call_type == CallTypes.acompletion.value
                 ):
-                    model_response = original_response["choices"][0]["message"][
-                        "content"
-                    ]
-                    ### POST-CALL RULES ###
-                    rules_obj.post_call_rules(input=model_response, model=model)
+                    is_coroutine = check_coroutine(original_function)
+                    if is_coroutine == True:
+                        pass
+                    else:
+                        model_response = original_response["choices"][0]["message"][
+                            "content"
+                        ]
+                        ### POST-CALL RULES ###
+                        rules_obj.post_call_rules(input=model_response, model=model)
         except Exception as e:
             raise e