diff --git a/homeassistant/components/google_generative_ai_conversation/config_flow.py b/homeassistant/components/google_generative_ai_conversation/config_flow.py
index 4fff5bff655..50b626f553c 100644
--- a/homeassistant/components/google_generative_ai_conversation/config_flow.py
+++ b/homeassistant/components/google_generative_ai_conversation/config_flow.py
@@ -63,7 +63,7 @@ STEP_USER_DATA_SCHEMA = vol.Schema(
 RECOMMENDED_OPTIONS = {
     CONF_RECOMMENDED: True,
     CONF_LLM_HASS_API: llm.LLM_API_ASSIST,
-    CONF_PROMPT: "",
+    CONF_PROMPT: DEFAULT_PROMPT,
 }
 
 
diff --git a/tests/components/google_generative_ai_conversation/test_config_flow.py b/tests/components/google_generative_ai_conversation/test_config_flow.py
index 6426386243c..55350325eee 100644
--- a/tests/components/google_generative_ai_conversation/test_config_flow.py
+++ b/tests/components/google_generative_ai_conversation/test_config_flow.py
@@ -19,6 +19,7 @@ from homeassistant.components.google_generative_ai_conversation.const import (
     CONF_TEMPERATURE,
     CONF_TOP_K,
     CONF_TOP_P,
+    DEFAULT_PROMPT,
     DOMAIN,
     RECOMMENDED_CHAT_MODEL,
     RECOMMENDED_HARM_BLOCK_THRESHOLD,
@@ -94,7 +95,7 @@ async def test_form(hass: HomeAssistant) -> None:
     assert result2["options"] == {
         CONF_RECOMMENDED: True,
         CONF_LLM_HASS_API: llm.LLM_API_ASSIST,
-        CONF_PROMPT: "",
+        CONF_PROMPT: DEFAULT_PROMPT,
     }
     assert len(mock_setup_entry.mock_calls) == 1