diff --git a/include/picrin/error.h b/include/picrin/error.h
index 0549c69d..5be65502 100644
--- a/include/picrin/error.h
+++ b/include/picrin/error.h
@@ -9,6 +9,19 @@
 extern "C" {
 #endif
 
+struct pic_error {
+  PIC_OBJECT_HEADER
+  pic_sym type;
+  pic_str *msg;
+  pic_value irrs;
+  pic_str *stack;
+};
+
+#define pic_error_p(v) (pic_type(v) == PIC_TT_ERROR)
+#define pic_error_ptr(v) ((struct pic_error *)pic_ptr(v))
+
+struct pic_error *pic_make_error(pic_state *, pic_sym, const char *, pic_list);
+
 /* do not return from try block! */
 
 #define pic_try                                 \
@@ -27,19 +40,6 @@ noreturn void pic_raise(pic_state *, pic_value);
 noreturn void pic_throw(pic_state *, pic_sym, const char *, pic_list);
 noreturn void pic_error(pic_state *, const char *, pic_list);
 
-struct pic_error {
-  PIC_OBJECT_HEADER
-  pic_sym type;
-  pic_str *msg;
-  pic_value irrs;
-  pic_str *stack;
-};
-
-#define pic_error_p(v) (pic_type(v) == PIC_TT_ERROR)
-#define pic_error_ptr(v) ((struct pic_error *)pic_ptr(v))
-
-struct pic_error *pic_make_error(pic_state *, pic_sym, const char *, pic_list);
-
 #if defined(__cplusplus)
 }
 #endif