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-rw-r--r--include/my_sys.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/my_sys.h b/include/my_sys.h
index 23c9b2da55f..7b437e2a745 100644
--- a/include/my_sys.h
+++ b/include/my_sys.h
@@ -256,7 +256,7 @@ extern my_bool my_disable_locking, my_disable_async_io,
extern char wild_many,wild_one,wild_prefix;
extern const char *charsets_dir;
/* from default.c */
-extern char *my_defaults_extra_file;
+extern const char *my_defaults_extra_file;
extern const char *my_defaults_group_suffix;
extern const char *my_defaults_file;