diff --git a/public/tier1/byteswap.h b/public/tier1/byteswap.h
index c7bc3c87..4bda2b26 100644
--- a/public/tier1/byteswap.h
+++ b/public/tier1/byteswap.h
@@ -234,7 +234,7 @@ private:
 			Assert( "Invalid size in CByteswap::LowLevelByteSwap" && 0 );
 		}
 #else
-		for( int i = 0; i < sizeof(T); i++ )
+		for( size_t i = 0; i < sizeof(T); i++ )
 		{
 			((unsigned char* )&temp)[i] = ((unsigned char*)input)[sizeof(T)-(i+1)]; 
 		}