diff --git a/mysql-test/r/ctype_big5.result b/mysql-test/r/ctype_big5.result
index 8d2c39df853..01b59b93b52 100644
--- a/mysql-test/r/ctype_big5.result
+++ b/mysql-test/r/ctype_big5.result
@@ -128,3 +128,9 @@ SELECT * FROM t1;
 a
 ùØ
 DROP TABLE t1;
+CREATE TABLE t1 (a CHAR(50) CHARACTER SET big5 NOT NULL, FULLTEXT(a));
+INSERT INTO t1 VALUES(0xA741ADCCA66EB6DC20A7DAADCCABDCA66E);
+SELECT HEX(a) FROM t1 WHERE MATCH(a) AGAINST (0xA741ADCCA66EB6DC IN BOOLEAN MODE);
+HEX(a)
+A741ADCCA66EB6DC20A7DAADCCABDCA66E
+DROP TABLE t1;
diff --git a/mysql-test/t/ctype_big5.test b/mysql-test/t/ctype_big5.test
index e4fb1d2a32b..73d9f06042c 100644
--- a/mysql-test/t/ctype_big5.test
+++ b/mysql-test/t/ctype_big5.test
@@ -28,4 +28,12 @@ INSERT INTO t1 VALUES ('
 SELECT * FROM t1;
 DROP TABLE t1;
 
+#
+# BUG#12075 - FULLTEXT non-functional for big5 strings
+#
+CREATE TABLE t1 (a CHAR(50) CHARACTER SET big5 NOT NULL, FULLTEXT(a));
+INSERT INTO t1 VALUES(0xA741ADCCA66EB6DC20A7DAADCCABDCA66E);
+SELECT HEX(a) FROM t1 WHERE MATCH(a) AGAINST (0xA741ADCCA66EB6DC IN BOOLEAN MODE);
+DROP TABLE t1;
+
 # End of 4.1 tests
diff --git a/strings/ctype-big5.c b/strings/ctype-big5.c
index b467c8c5ba3..73e3efd09a7 100644
--- a/strings/ctype-big5.c
+++ b/strings/ctype-big5.c
@@ -61,12 +61,12 @@ static uchar NEAR ctype_big5[257] =
   2,2,2,2,2,2,2,2,2,2,2,16,16,16,16,32,
   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+  0,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,
+  3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,
+  3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,
+  3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,
+  3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,
+  3,3,3,3,3,3,3,3,3,3,0,0,0,0,0,0,
 };
 
 static uchar NEAR to_lower_big5[]=