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-rw-r--r--include/ruby/intern.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/ruby/intern.h b/include/ruby/intern.h
index d2699caca8..e8821acda4 100644
--- a/include/ruby/intern.h
+++ b/include/ruby/intern.h
@@ -289,7 +289,7 @@ void rb_check_copyable(VALUE obj, VALUE orig);
/* eval.c */
int rb_sourceline(void);
const char *rb_sourcefile(void);
-VALUE rb_check_funcall(VALUE, ID, int, VALUE*);
+VALUE rb_check_funcall(VALUE, ID, int, const VALUE*);
NORETURN(void rb_error_arity(int, int, int));
#define rb_check_arity rb_check_arity /* for ifdef */