From bdebe6592782514077d1083f16a14197ea9e503c Mon Sep 17 00:00:00 2001
From: Austin Lee <austin@aryn.ai>
Date: Wed, 11 Oct 2023 14:52:12 -0700
Subject: [PATCH] Check if systemPrompt is null.

Signed-off-by: Austin Lee <austin@aryn.ai>
---
 .../questionanswering/generative/prompt/PromptUtil.java    | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/search-processors/src/main/java/org/opensearch/searchpipelines/questionanswering/generative/prompt/PromptUtil.java b/search-processors/src/main/java/org/opensearch/searchpipelines/questionanswering/generative/prompt/PromptUtil.java
index c494e17b89..3a8a21614e 100644
--- a/search-processors/src/main/java/org/opensearch/searchpipelines/questionanswering/generative/prompt/PromptUtil.java
+++ b/search-processors/src/main/java/org/opensearch/searchpipelines/questionanswering/generative/prompt/PromptUtil.java
@@ -104,8 +104,11 @@ public static String buildSingleStringPrompt(
         }
 
         StringBuilder bldr = new StringBuilder();
-        bldr.append(systemPrompt);
-        bldr.append(NEWLINE);
+
+        if (!Strings.isNullOrEmpty(systemPrompt)) {
+            bldr.append(systemPrompt);
+            bldr.append(NEWLINE);
+        }
         if (!Strings.isNullOrEmpty(userInstructions)) {
             bldr.append(userInstructions);
             bldr.append(NEWLINE);