1 files changed, 1 insertions, 1 deletions
diff --git a/intern.h b/intern.h
index 4cd58b31d3..4df7106a7a 100644
--- a/intern.h
+++ b/intern.h
@@ -518,7 +518,7 @@ 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 */