diff --git a/ext/mbstring/common_codepoints.txt b/ext/mbstring/common_codepoints.txt
index f50b67fda48a4..d89426cedfa27 100644
--- a/ext/mbstring/common_codepoints.txt
+++ b/ext/mbstring/common_codepoints.txt
@@ -8,10 +8,12 @@
 0x0118	0x011B # Polish, Czech
 0x0141	0x0144 # Polish
 0x0147	0x0148 # Czech
+0x0150	0x0151 # Hungarian
 0x0158	0x015B # Czech, Polish
 0x0160	0x0161 # Used in Slavic names
 0x0164	0x0165 # Czech
 0x016E	0x016F # Czech
+0x0170	0x0171 # Hungarian
 0x0179	0x017E # Polish, Czech, other Slavic languages
 0x0300	0x030A # Diacritical marks
 0x0370	0x0377 # Greek
diff --git a/ext/mbstring/rare_cp_bitvec.h b/ext/mbstring/rare_cp_bitvec.h
index 4027da2556dee..451c588bd64d6 100644
--- a/ext/mbstring/rare_cp_bitvec.h
+++ b/ext/mbstring/rare_cp_bitvec.h
@@ -11,7 +11,7 @@
 
 static uint32_t rare_codepoint_bitvec[] = {
 0xffffd9ff, 0x00000000, 0x00000000, 0x80000000, 0xffffffff, 0x00002001, 0x00000000, 0x00000000,
-0xf0ff0f0f, 0xffffffff, 0xf0fffe61, 0x81ff3fcc, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+0xf0ff0f0f, 0xffffffff, 0xf0fcfe61, 0x81fc3fcc, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
 0xfffff800, 0xffffffff, 0xffffffff, 0x0300ffff, 0x0000280f, 0x00000004, 0x00000000, 0x00000000,
 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
diff --git a/ext/mbstring/tests/mb_detect_encoding.phpt b/ext/mbstring/tests/mb_detect_encoding.phpt
index 2e0191680ebdf..a9d48ee5f9488 100644
--- a/ext/mbstring/tests/mb_detect_encoding.phpt
+++ b/ext/mbstring/tests/mb_detect_encoding.phpt
@@ -15,6 +15,7 @@ $euc_jp = "\xC6\xFC\xCB\xDC\xB8\xEC\xA5\xC6\xA5\xAD\xA5\xB9\xA5\xC8\xA4\xC7\xA4\
 // UTF-8
 $polish1 = "Zażółć gęślą jaźń.";
 $polish2 = "Wół poszedł spać bardzo wcześnie. A to zdanie bez ogonka.";
+$hungarian = "Árvíztűrő tükörfúrógép";
 
 echo "== BASIC TEST ==\n";
 
@@ -309,6 +310,8 @@ $czechEncodings = [
 ];
 test($czechStrings, $czechEncodings);
 
+test([$hungarian], ['UTF-8', 'UTF-16', 'Windows-1252']);
+
 echo "Done!\n";
 
 ?>