diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index 649ece290a..9e9423e810 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -2163,11 +2163,6 @@ rb_array_const_ptr(VALUE a)
     return rb_array_const_ptr_transient(a);
 }
 
-/* fix related to r66200 */
-#ifdef __INTEL_COMPILER
-VALUE *rb_ary_ptr_use_start(VALUE ary);
-#endif
-
 /* internal function. do not use this function */
 static inline VALUE *
 rb_array_ptr_use_start(VALUE a, int allow_transient)
diff --git a/internal.h b/internal.h
index a92b0d4a54..bc9b1d6355 100644
--- a/internal.h
+++ b/internal.h
@@ -2223,6 +2223,7 @@ VALUE rb_thread_io_blocking_region(rb_blocking_function_t *func, void *data1, in
 
 /* array.c (export) */
 void rb_ary_detransient(VALUE a);
+VALUE *rb_ary_ptr_use_start(VALUE ary);
 
 /* bignum.c (export) */
 VALUE rb_big_mul_normal(VALUE x, VALUE y);