@@ -545,12 +545,12 @@
 
 	if (maxZerosCount >= 2) {
 		for (int_fast8_t i = 0; i < maxZerosStart; i += 2) {
 			[string appendFormat:
 			    (first ? @"%x" : @":%x"),
-			    (addrIn6->sin6_addr.s6_addr[i] << 8) |
-			    addrIn6->sin6_addr.s6_addr[i + 1]];
+			    (addrIn6->sin6_addr.s6_addr[(uint_fast8_t)i] << 8) |
+			    addrIn6->sin6_addr.s6_addr[(uint_fast8_t)i + 1]];
 			first = false;
 		}
 
 		[string appendString: @"::"];
 		first = true;
@@ -557,12 +557,12 @@
 
 		for (int_fast8_t i = maxZerosStart + (maxZerosCount * 2);
 		    i < 16; i += 2) {
 			[string appendFormat:
 			    (first ? @"%x" : @":%x"),
-			    (addrIn6->sin6_addr.s6_addr[i] << 8) |
-			    addrIn6->sin6_addr.s6_addr[i + 1]];
+			    (addrIn6->sin6_addr.s6_addr[(uint_fast8_t)i] << 8) |
+			    addrIn6->sin6_addr.s6_addr[(uint_fast8_t)i + 1]];
 			first = false;
 		}
 	} else {
 		for (uint_fast8_t i = 0; i < 16; i += 2) {
 			[string appendFormat: