diff --git a/main/SS/Formula/Functions/Text/SearchFind.cs b/main/SS/Formula/Functions/Text/SearchFind.cs
index 9af3737e8..7f4845361 100644
--- a/main/SS/Formula/Functions/Text/SearchFind.cs
+++ b/main/SS/Formula/Functions/Text/SearchFind.cs
@@ -47,6 +47,11 @@ public override ValueEval Evaluate(int srcRowIndex, int srcColumnIndex, ValueEva
         }
         private ValueEval Eval(String haystack, String needle, int startIndex)
         {
+            if (startIndex >= haystack.Length)
+            {
+                return ErrorEval.VALUE_INVALID;
+            }
+            
             int result;
             if (_isCaseSensitive)
             {