1 files changed, 1 insertions, 1 deletions
diff --git a/intern.h b/intern.h
index e7e06efb0a..a7d82a671a 100644
--- a/intern.h
+++ b/intern.h
@@ -467,7 +467,7 @@ VALUE rb_struct_alloc _((VALUE, VALUE));
 VALUE rb_struct_aref _((VALUE, VALUE));
 VALUE rb_struct_aset _((VALUE, VALUE, VALUE));
 VALUE rb_struct_getmember _((VALUE, ID));
-VALUE rb_struct_iv_get _((VALUE, char*));
+VALUE rb_struct_iv_get _((VALUE, const char*));
 VALUE rb_struct_s_members _((VALUE));
 VALUE rb_struct_members _((VALUE));
 /* time.c */