diff --git a/BinaryObjectScanner/Protection/SecuROM.cs b/BinaryObjectScanner/Protection/SecuROM.cs
index aee5d5f8..b10f2abd 100644
--- a/BinaryObjectScanner/Protection/SecuROM.cs
+++ b/BinaryObjectScanner/Protection/SecuROM.cs
@@ -157,7 +157,7 @@ namespace BinaryObjectScanner.Protection
             // Search for the "AddD" string in the overlay
             bool found = false;
             int index = 0;
-            for (; index < 0x100; index++)
+            for (; index < 0x100 && index + 4 < overlayData.Length; index++)
             {
                 int temp = index;
                 byte[] overlaySample = overlayData.ReadBytes(ref temp, 0x04);