diff --git a/error.c b/error.c
index 43ad798744..d760de2a5f 100644
--- a/error.c
+++ b/error.c
@@ -867,11 +867,9 @@ static ID id_new, id_cause, id_message, id_backtrace;
 static ID id_name, id_key, id_args, id_Errno, id_errno, id_i_path;
 static ID id_receiver, id_iseq, id_local_variables;
 static ID id_private_call_p;
-extern ID ruby_static_id_status;
 #define id_bt idBt
 #define id_bt_locations idBt_locations
 #define id_mesg idMesg
-#define id_status ruby_static_id_status
 
 #undef rb_exc_new_cstr
 
diff --git a/eval.c b/eval.c
index a09dddf8c6..c6fbd2e595 100644
--- a/eval.c
+++ b/eval.c
@@ -26,8 +26,6 @@ VALUE rb_eSysStackError;
 
 ID ruby_static_id_signo, ruby_static_id_status;
 static ID id_cause;
-#define id_signo ruby_static_id_signo
-#define id_status ruby_static_id_status
 
 #define exception_error GET_VM()->special_exceptions[ruby_error_reenter]
 
diff --git a/internal.h b/internal.h
index 2d1b942fc3..20c1f9750c 100644
--- a/internal.h
+++ b/internal.h
@@ -1209,6 +1209,9 @@ VALUE rb_warning_string(const char *fmt, ...);
 
 /* eval.c */
 VALUE rb_refinement_module_get_refined_class(VALUE module);
+extern ID ruby_static_id_signo, ruby_static_id_status;
+#define id_signo ruby_static_id_signo
+#define id_status ruby_static_id_status
 
 /* eval_error.c */
 VALUE rb_get_backtrace(VALUE info);
diff --git a/process.c b/process.c
index 48cdb608cd..c1f695895c 100644
--- a/process.c
+++ b/process.c
@@ -273,8 +273,6 @@ static ID id_CLOCK_BASED_CLOCK_PROCESS_CPUTIME_ID;
 static ID id_MACH_ABSOLUTE_TIME_BASED_CLOCK_MONOTONIC;
 #endif
 static ID id_hertz;
-extern ID ruby_static_id_status;
-#define id_status ruby_static_id_status
 
 /* execv and execl are async-signal-safe since SUSv4 (POSIX.1-2008, XPG7) */
 #if defined(__sun) && !defined(_XPG7) /* Solaris 10, 9, ... */
diff --git a/signal.c b/signal.c
index e5468efb53..d6e42effc7 100644
--- a/signal.c
+++ b/signal.c
@@ -41,9 +41,6 @@
 # define VALGRIND_MAKE_MEM_UNDEFINED(p, n) 0
 #endif
 
-extern ID ruby_static_id_signo;
-#define id_signo ruby_static_id_signo
-
 #ifdef NEED_RUBY_ATOMIC_OPS
 rb_atomic_t
 ruby_atomic_exchange(rb_atomic_t *ptr, rb_atomic_t val)