--- libc/misc/wchar/wchar.c
+++ libc/misc/wchar/wchar.c
@@ -1368,9 +1368,9 @@
 			if (inci == 4) {
 				wc = (((unsigned int)((unsigned char)((*inbuf)[2]))) << 8)
 					+ ((unsigned char)((*inbuf)[3])) + (wc << 16);
-				if (!(px->fromcodeset & 1)) wc = bswap_32(wc);
+				if (px->fromcodeset & 1) wc = bswap_32(wc);
 			} else {
-				if (!(px->fromcodeset & 1)) wc = bswap_16(wc);
+				if (px->fromcodeset & 1) wc = bswap_16(wc);
 				if (((px->fromcodeset & IC_UTF_16) == IC_UTF_16)
 					 && (((__uwchar_t)(wc - 0xd800U)) < (0xdc00U - 0xd800U))
 					) {			/* surrogate */
@@ -1378,7 +1378,7 @@
 					if (*inbytesleft < 4) goto INVALID;
 					wc2 = (((unsigned int)((unsigned char)((*inbuf)[2]))) << 8)
 						+ ((unsigned char)((*inbuf)[3]));
-					if (!(px->fromcodeset & 1)) wc = bswap_16(wc2);
+					if (px->fromcodeset & 1) wc = bswap_16(wc2);
 					if (((__uwchar_t)(wc2 -= 0xdc00U)) < (0xe0000U - 0xdc00U)) {
 						goto ILLEGAL;
 					}
@@ -1503,11 +1503,14 @@
 					wc += (wc2 << 16);
 				} else if (px->tocodeset & 1) wc = bswap_16(wc);
 			}				
-			(*outbuf)[0] = (char)((unsigned char)(wc));
-			(*outbuf)[1] = (char)((unsigned char)(wc >> 8));
 			if (inco == 4) {
-				(*outbuf)[2] = (char)((unsigned char)(wc >> 16));
-				(*outbuf)[3] = (char)((unsigned char)(wc >> 24));
+				(*outbuf)[0] = (char)((unsigned char)(wc >> 24));
+				(*outbuf)[1] = (char)((unsigned char)(wc >> 16));
+				(*outbuf)[2] = (char)((unsigned char)(wc >> 8));
+				(*outbuf)[3] = (char)((unsigned char)(wc));
+			} else {
+				(*outbuf)[0] = (char)((unsigned char)(wc >> 8));
+				(*outbuf)[1] = (char)((unsigned char)(wc));
 			}
 		} else if (px->tocodeset == IC_UTF_8) {
 			const wchar_t *pw = &wc;