diff --git a/backend/open_webui/routers/ollama.py b/backend/open_webui/routers/ollama.py
index 2dd566f2a..95f48fb1c 100644
--- a/backend/open_webui/routers/ollama.py
+++ b/backend/open_webui/routers/ollama.py
@@ -1283,16 +1283,15 @@ async def generate_chat_completion(
         params = model_info.params.model_dump()
 
         if params:
-            if payload.get("options") is None:
-                payload["options"] = {}
+            system = params.pop("system", None)
 
+            # Unlike OpenAI, Ollama does not support params directly in the body
             payload["options"] = apply_model_params_to_body_ollama(
-                params, payload["options"]
-            )
-            payload = apply_model_system_prompt_to_body(
-                params.get("system"), payload, metadata, user
+                params, (payload.get("options", {}) or {})
             )
 
+            payload = apply_model_system_prompt_to_body(system, payload, metadata, user)
+
         # Check if user has access to the model
         if not bypass_filter and user.role == "user":
             if not (