diff --git a/r5dev/tier1/lzss.cpp b/r5dev/tier1/lzss.cpp
index d9f9f39e..761dd94f 100644
--- a/r5dev/tier1/lzss.cpp
+++ b/r5dev/tier1/lzss.cpp
@@ -330,7 +330,7 @@ unsigned int CLZSS::SafeUncompress( unsigned char *pInput, unsigned char *pOutpu
 				break;
 			}
 
-			if ( position > totalBytes || // out of bounds
+			if ( position + 1 > totalBytes || // out of bounds
 				totalBytes + count > unBufSize )
 			{
 				return 0;