diff --git a/mysql-test/r/mysqldump.result b/mysql-test/r/mysqldump.result
index 923c5084d47..c9042600864 100644
--- a/mysql-test/r/mysqldump.result
+++ b/mysql-test/r/mysqldump.result
@@ -655,6 +655,7 @@ UNLOCK TABLES;
 /*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
 /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
 
+--fields-optionally-enclosed-by="
 
 /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
 /*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
diff --git a/mysql-test/std_data/bug15328.cnf b/mysql-test/std_data/bug15328.cnf
new file mode 100644
index 00000000000..e23d33bfa54
--- /dev/null
+++ b/mysql-test/std_data/bug15328.cnf
@@ -0,0 +1,2 @@
+[mysqldump]
+fields-optionally-enclosed-by="
diff --git a/mysql-test/t/mysqldump.test b/mysql-test/t/mysqldump.test
index 74610fec0f4..d53022665a0 100644
--- a/mysql-test/t/mysqldump.test
+++ b/mysql-test/t/mysqldump.test
@@ -606,6 +606,13 @@ select * from t2 order by a;
 drop table t1, t2;
 drop database db1;
 
+#
+# BUG#15328 Segmentation fault occured if my.cnf is invalid for escape sequence
+#
+
+--exec $MYSQL_MY_PRINT_DEFAULTS --defaults-extra-file=$MYSQL_TEST_DIR/std_data/bug15328.cnf mysqldump
+
+
 #
 # Bug #9558 mysqldump --no-data db t1 t2 format still dumps data
 #
diff --git a/mysys/default.c b/mysys/default.c
index 90f8dc5f689..540968d4ba0 100644
--- a/mysys/default.c
+++ b/mysys/default.c
@@ -755,7 +755,9 @@ static int search_default_file_with_ext(Process_option_func opt_handler,
 	value_end=value;
 
       /* remove quotes around argument */
-      if ((*value == '\"' || *value == '\'') && *value == value_end[-1])
+      if ((*value == '\"' || *value == '\'') && /* First char is quote */
+          (value + 1 < value_end ) && /* String is longer than 1 */
+          *value == value_end[-1] ) /* First char is equal to last char */
       {
 	value++;
 	value_end--;