diff --git a/external/3rd/library/soePlatform/ChatAPI/utils/UdpLibrary/UdpMisc.cpp b/external/3rd/library/soePlatform/ChatAPI/utils/UdpLibrary/UdpMisc.cpp
index f88a9b30..b50daae0 100644
--- a/external/3rd/library/soePlatform/ChatAPI/utils/UdpLibrary/UdpMisc.cpp
+++ b/external/3rd/library/soePlatform/ChatAPI/utils/UdpLibrary/UdpMisc.cpp
@@ -39,7 +39,7 @@ int UdpMisc::Random(int *seed)
     return(*seed);
 }
 
-long UdpMisc::Crc32(const void *buffer, int bufferLen, int encryptValue)
+unsigned long int UdpMisc::Crc32(const void *buffer, int bufferLen, int encryptValue)
 {
     static unsigned crc32_table[256] = { 
     0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F,
@@ -86,7 +86,7 @@ long UdpMisc::Crc32(const void *buffer, int bufferLen, int encryptValue)
     0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
     0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D};
 
-    long crc = 0xffffffff;
+    unsigned long int crc = 0xffffffff;
     crc = ((crc >> 8) & 0x00FFFFFFL) ^ crc32_table[(crc ^ (encryptValue & 0xff)) & 0x000000FFL];
     crc = ((crc >> 8) & 0x00FFFFFFL) ^ crc32_table[(crc ^ ((encryptValue >> 8) & 0xff)) & 0x000000FFL];
     crc = ((crc >> 8) & 0x00FFFFFFL) ^ crc32_table[(crc ^ ((encryptValue >> 16) & 0xff)) & 0x000000FFL];
diff --git a/external/3rd/library/soePlatform/ChatAPI/utils/UdpLibrary/UdpMisc.h b/external/3rd/library/soePlatform/ChatAPI/utils/UdpLibrary/UdpMisc.h
index b4f5d7b4..3961823f 100644
--- a/external/3rd/library/soePlatform/ChatAPI/utils/UdpLibrary/UdpMisc.h
+++ b/external/3rd/library/soePlatform/ChatAPI/utils/UdpLibrary/UdpMisc.h
@@ -36,7 +36,7 @@ class UdpMisc
 
 
         static int ClockDiff(UdpClockStamp start, UdpClockStamp stop);    // returns a time difference in milliseconds (if difference is over 23 days, it returns 23 days)
-        static long Crc32(const void *buffer, int bufferLen, int encryptValue = 0);                // calculate a 32-bit crc for a buffer (encrypt value simple scrambles the crc at the beginning so the same packet doesn't produce the same crc on different connections)
+		static unsigned long int Crc32(const void *buffer, int bufferLen, int encryptValue = 0);                // calculate a 32-bit crc for a buffer (encrypt value simple scrambles the crc at the beginning so the same packet doesn't produce the same crc on different connections)
         static int Random(int *seed);                                // random number generator
         static void Sleep(int milliseconds);
 
diff --git a/external/3rd/library/udplibrary/UdpLibrary.cpp b/external/3rd/library/udplibrary/UdpLibrary.cpp
index 90ddb01f..3612cdf9 100644
--- a/external/3rd/library/udplibrary/UdpLibrary.cpp
+++ b/external/3rd/library/udplibrary/UdpLibrary.cpp
@@ -4134,7 +4134,7 @@ int UdpMisc::Random(int *seed)
 	return(*seed);
 }
 
-int UdpMisc::Crc32(const void *buffer, int bufferLen, int encryptValue)
+unsigned long int UdpMisc::Crc32(const void *buffer, int bufferLen, int encryptValue)
 {
 	static unsigned crc32_table[256] = { 
 	0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F,
@@ -4181,11 +4181,11 @@ int UdpMisc::Crc32(const void *buffer, int bufferLen, int encryptValue)
 	0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
 	0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D};
 
-	int crc = 0xffffffff;
-	crc = ((LEFT_SHIFT(crc, 8) & 0x00FFFFFFL)) ^ crc32_table[(crc ^ (encryptValue & 0xff)) & 0x000000FFL];
-	crc = ((LEFT_SHIFT(crc, 8) & 0x00FFFFFFL)) ^ crc32_table[(crc ^ ((encryptValue >> 8) & 0xff)) & 0x000000FFL];
-	crc = ((LEFT_SHIFT(crc, 8) & 0x00FFFFFFL)) ^ crc32_table[(crc ^ ((encryptValue >> 16) & 0xff)) & 0x000000FFL];
-	crc = ((LEFT_SHIFT(crc, 8) & 0x00FFFFFFL)) ^ crc32_table[(crc ^ ((encryptValue >> 24) & 0xff)) & 0x000000FFL];
+	unsigned long int crc = 0xffffffff;
+	crc = ((crc >> 8) & 0x00FFFFFFL) ^ crc32_table[(crc ^ (encryptValue & 0xff)) & 0x000000FFL];
+	crc = ((crc >> 8) & 0x00FFFFFFL) ^ crc32_table[(crc ^ ((encryptValue >> 8) & 0xff)) & 0x000000FFL];
+	crc = ((crc >> 8) & 0x00FFFFFFL) ^ crc32_table[(crc ^ ((encryptValue >> 16) & 0xff)) & 0x000000FFL];
+	crc = ((crc >> 8) & 0x00FFFFFFL) ^ crc32_table[(crc ^ ((encryptValue >> 24) & 0xff)) & 0x000000FFL];
 
 	const uchar *bufPtr = (const uchar *)buffer;
 	const uchar *endPtr = (const uchar *)buffer + bufferLen;
diff --git a/external/3rd/library/udplibrary/UdpLibrary.hpp b/external/3rd/library/udplibrary/UdpLibrary.hpp
index 77f909b0..43a20328 100644
--- a/external/3rd/library/udplibrary/UdpLibrary.hpp
+++ b/external/3rd/library/udplibrary/UdpLibrary.hpp
@@ -124,7 +124,7 @@ class UdpMisc
 		static int ClockElapsed(ClockStamp stamp);					// returns a elapsed time since stamp in milliseconds (if elapsed is over 23 days, it returns 23 days)
 		static int ClockDiff(ClockStamp start, ClockStamp stop);	// returns a time difference in milliseconds (if difference is over 23 days, it returns 23 days)
 
-		static int Crc32(const void *buffer, int bufferLen, int encryptValue = 0);				// calculate a 32-bit crc for a buffer (encrypt value simple scrambles the crc at the beginning so the same packet doesn't produce the same crc on different connections)
+		static unsigned long int Crc32(const void *buffer, int bufferLen, int encryptValue = 0);				// calculate a 32-bit crc for a buffer (encrypt value simple scrambles the crc at the beginning so the same packet doesn't produce the same crc on different connections)
 		static int Random(int *seed);								// random number generator
 		static void Sleep(int milliseconds);