diff --git a/examples/ThirdPartyLibs/zlib/inftrees.c b/examples/ThirdPartyLibs/zlib/inftrees.c
index a7a8f01a7c..4de5cc4261 100644
--- a/examples/ThirdPartyLibs/zlib/inftrees.c
+++ b/examples/ThirdPartyLibs/zlib/inftrees.c
@@ -54,7 +54,7 @@ unsigned short FAR *work;
 	code FAR *next;                          /* next available space in table */
 	const unsigned short FAR *base;          /* base value table to use */
 	const unsigned short FAR *extra;         /* extra bits table to use */
-	int end;                                 /* use base and extra for symbol > end */
+	unsigned match;             			 /* use base and extra for symbol >= match */
 	unsigned short count[MAXBITS + 1];       /* number of codes of each length */
 	unsigned short offs[MAXBITS + 1];        /* offsets in table for each length */
 	static const unsigned short lbase[31] = {/* Length codes 257..285 base */
@@ -184,19 +184,17 @@ unsigned short FAR *work;
 	{
 		case CODES:
 			base = extra = work; /* dummy value--not used */
-			end = 19;
+			match = 20;
 			break;
 		case LENS:
 			base = lbase;
-			base -= 257;
 			extra = lext;
-			extra -= 257;
-			end = 256;
+			match = 257;
 			break;
 		default: /* DISTS */
 			base = dbase;
 			extra = dext;
-			end = -1;
+			match = 0;
 	}
 
 	/* initialize state for loop */
@@ -220,15 +218,15 @@ unsigned short FAR *work;
 	{
 		/* create table entry */
 		here.bits = (unsigned char)(len - drop);
-		if ((int)(work[sym]) < end)
+		if (work[sym] + 1 < match) {
 		{
 			here.op = (unsigned char)0;
 			here.val = work[sym];
 		}
-		else if ((int)(work[sym]) > end)
+		else if (work[sym] >= match) 
 		{
-			here.op = (unsigned char)(extra[work[sym]]);
-			here.val = base[work[sym]];
+            here.op = (unsigned char)(extra[work[sym] - match]);
+            here.val = base[work[sym] - match];
 		}
 		else
 		{