diff --git a/litellm/llms/base_llm/guardrail_translation/utils.py b/litellm/llms/base_llm/guardrail_translation/utils.py
index c47a56b5ea9..51d43436fc9 100644
--- a/litellm/llms/base_llm/guardrail_translation/utils.py
+++ b/litellm/llms/base_llm/guardrail_translation/utils.py
@@ -373,13 +373,17 @@ def _content_part_text(part: object) -> str | None:
     return text if isinstance(text, str) else None
 
 
-def message_text_slot_count(message: AllMessageValues) -> int:
+def message_slot_texts(message: Mapping[str, object]) -> tuple[str, ...]:
     content: Final = message.get("content")
     if isinstance(content, str):
-        return 1
+        return (content,)
     if isinstance(content, list):
-        return sum(1 for part in content if _content_part_text(part) is not None)
-    return 0
+        return tuple(text for part in content if (text := _content_part_text(part)) is not None)
+    return ()
+
+
+def message_text_slot_count(message: AllMessageValues) -> int:
+    return len(message_slot_texts(message))
 
 
 def _part_with_text(part: object, text: str) -> object:
diff --git a/litellm/proxy/guardrails/guardrail_hooks/prompt_security/prompt_security.py b/litellm/proxy/guardrails/guardrail_hooks/prompt_security/prompt_security.py
index 3f29b3e751c..7e43566f224 100644
--- a/litellm/proxy/guardrails/guardrail_hooks/prompt_security/prompt_security.py
+++ b/litellm/proxy/guardrails/guardrail_hooks/prompt_security/prompt_security.py
@@ -15,7 +15,7 @@ from litellm.integrations.custom_guardrail import (
     CustomGuardrail,
     log_guardrail_information,
 )
-from litellm.llms.base_llm.guardrail_translation.utils import message_with_slot_texts
+from litellm.llms.base_llm.guardrail_translation.utils import message_slot_texts, message_with_slot_texts
 from litellm.llms.custom_httpx.http_handler import (
     get_async_httpx_client,
     httpxSpecialProvider,
@@ -399,19 +399,7 @@ class PromptSecurityGuardrail(CustomGuardrail):
         return inputs
 
     def _extract_texts_from_messages(self, messages: Sequence[Mapping[str, object]]) -> list[str]:
-        """Extract text content from messages."""
-        texts: Final = []
-        for message in messages:
-            content = message.get("content")
-            if isinstance(content, str):
-                texts.append(content)
-            elif isinstance(content, list):
-                for item in content:
-                    if isinstance(item, dict) and item.get("type") == "text":
-                        text = item.get("text")
-                        if text:
-                            texts.append(text)
-        return texts
+        return [text for message in messages for text in message_slot_texts(message)]
 
     async def _process_standalone_images(self, images: list[str], user_api_key_alias: str | None) -> None:
         """Process standalone images from inputs (data URLs)."""
diff --git a/tests/test_litellm/proxy/guardrails/test_prompt_security_guardrails.py b/tests/test_litellm/proxy/guardrails/test_prompt_security_guardrails.py
index 785895b6190..3218632a8d2 100644
--- a/tests/test_litellm/proxy/guardrails/test_prompt_security_guardrails.py
+++ b/tests/test_litellm/proxy/guardrails/test_prompt_security_guardrails.py
@@ -269,6 +269,30 @@ async def test_modify_with_unexpected_message_count_keeps_texts_only(monkeypatch
     assert result["texts"] == ["Look up [REDACTED]"]
 
 
+@pytest.mark.asyncio
+async def test_modify_keeps_empty_text_parts_as_slots(monkeypatch: pytest.MonkeyPatch):
+    """The chat handler counts an empty text part as a slot, so a modify verdict
+    that echoes the empty part still lines up with the row and its texts."""
+    monkeypatch.setenv("PROMPT_SECURITY_API_KEY", "test-key")
+    monkeypatch.setenv("PROMPT_SECURITY_API_BASE", "https://test.prompt.security")
+    guardrail = PromptSecurityGuardrail(guardrail_name="test-guard", event_hook="pre_call", default_on=True)
+    messages: list[AllMessageValues] = [
+        {"role": "user", "content": [{"type": "text", "text": "Look up 123-45-6789"}, {"type": "text", "text": ""}]}
+    ]
+    inputs = {"texts": ["Look up 123-45-6789", ""], "structured_messages": messages}
+    modified_messages = [
+        {"role": "user", "content": [{"type": "text", "text": "Look up [REDACTED]"}, {"type": "text", "text": ""}]}
+    ]
+
+    with patch.object(guardrail.async_handler, "post", return_value=_modify_response(modified_messages)):
+        result = await guardrail.apply_guardrail(
+            inputs=inputs, request_data={"messages": messages}, input_type="request"
+        )
+
+    assert result["structured_messages"] == modified_messages
+    assert result["texts"] == ["Look up [REDACTED]", ""]
+
+
 @pytest.mark.asyncio
 async def test_apply_guardrail_allow_request(monkeypatch: pytest.MonkeyPatch):
     """Test that apply_guardrail allows safe prompts"""