diff --git a/include/picrin.h b/include/picrin.h
index 6a1b3073..51fd36eb 100644
--- a/include/picrin.h
+++ b/include/picrin.h
@@ -180,10 +180,15 @@ void pic_import(pic_state *, pic_value);
 void pic_export(pic_state *, pic_sym);
 
 noreturn void pic_abort(pic_state *, const char *);
-noreturn void pic_error(pic_state *, const char *); /* obsoleted */
 noreturn void pic_errorf(pic_state *, const char *, ...);
 void pic_warn(pic_state *, const char *);
 
+/* obsoleted */
+noreturn static inline void pic_error(pic_state *pic, const char *msg)
+{
+  pic_errorf(pic, msg);
+}
+
 const char *pic_errmsg(pic_state *);
 
 pic_value pic_write(pic_state *, pic_value); /* returns given obj */
diff --git a/src/error.c b/src/error.c
index 42ccacf3..9cd973c6 100644
--- a/src/error.c
+++ b/src/error.c
@@ -58,12 +58,6 @@ pic_errmsg(pic_state *pic)
   return pic_str_cstr(pic->err->msg);
 }
 
-void
-pic_error(pic_state *pic, const char *msg)
-{
-  pic_errorf(pic, msg);
-}
-
 void
 pic_errorf(pic_state *pic, const char *fmt, ...)
 {