diff --git a/src/nxt_string.c b/src/nxt_string.c
index d567883f..dfaea6bc 100644
--- a/src/nxt_string.c
+++ b/src/nxt_string.c
@@ -521,19 +521,17 @@ nxt_encode_uri(u_char *dst, u_char *src, size_t length)
 
     static const u_char  hex[16] = "0123456789ABCDEF";
 
-                    /* " ", "#", "%", "?", %00-%1F, %7F-%FF */
-
     static const uint32_t  escape[] = {
         0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
 
                     /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
-        0x80000029, /* 1000 0000 0000 0000 0000 0000 0010 1001 */
+        0xd000002d, /* 1101 0000 0000 0000 0000 0000 0010 1101 */
 
                     /* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
-        0x00000000, /* 0000 0000 0000 0000 0000 0000 0000 0000 */
+        0x50000000, /* 0101 0000 0000 0000 0000 0000 0000 0000 */
 
-                    /* ~}| {zyx wvut srqp onml kjih gfed cba` */
-        0x80000000, /* 1000 0000 0000 0000 0000 0000 0000 0000 */
+                    /*  ~}| {zyx wvut srqp onml kjih gfed cba` */
+        0xb8000001, /* 1011 1000 0000 0000 0000 0000 0000 0001 */
 
         0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
         0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */