diff --git a/include/picrin.h b/include/picrin.h
index b69141ac..0767b008 100644
--- a/include/picrin.h
+++ b/include/picrin.h
@@ -134,15 +134,6 @@ void pic_define(pic_state *, const char *, pic_value); /* automatic export */
 pic_value pic_ref(pic_state *, const char *);
 void pic_set(pic_state *, const char *, pic_value);
 
-#define pic_try                                                 \
-  pic_try_helper__(GENSYM(i), GENSYM(here), GENSYM(prev_jmp))
-#define pic_try_helper__(i, here, prev_jmp)                             \
-  for (int i = 0; ! i; )                                                \
-    for (jmp_buf here, *prev_jmp = pic->jmp; ! i; )                     \
-      for (pic->jmp = &here; ! i++; pic->jmp = prev_jmp)                \
-        if (setjmp(here) == 0)
-#define pic_catch else
-
 struct pic_proc *pic_get_proc(pic_state *);
 int pic_get_args(pic_state *, const char *, ...);
 void pic_defun(pic_state *, const char *, pic_func_t);
diff --git a/include/picrin/error.h b/include/picrin/error.h
index 475fd661..69db71c9 100644
--- a/include/picrin/error.h
+++ b/include/picrin/error.h
@@ -24,6 +24,15 @@ struct pic_error {
 #define pic_error_p(v) (pic_type(v) == PIC_TT_ERROR)
 #define pic_error_ptr(v) ((struct pic_error *)pic_ptr(v))
 
+#define pic_try                                                 \
+  pic_try_helper__(GENSYM(i), GENSYM(here), GENSYM(prev_jmp))
+#define pic_try_helper__(i, here, prev_jmp)                             \
+  for (int i = 0; ! i; )                                                \
+    for (jmp_buf here, *prev_jmp = pic->jmp; ! i; )                     \
+      for (pic->jmp = &here; ! i++; pic->jmp = prev_jmp)                \
+        if (setjmp(here) == 0)
+#define pic_catch else
+
 pic_value pic_raise_continuable(pic_state *, pic_value);
 
 #if defined(__cplusplus)
diff --git a/src/init.c b/src/init.c
index 0b6a11ff..537dbdf6 100644
--- a/src/init.c
+++ b/src/init.c
@@ -8,6 +8,7 @@
 #include "picrin/pair.h"
 #include "picrin/lib.h"
 #include "picrin/macro.h"
+#include "picrin/error.h"
 
 void pic_init_bool(pic_state *);
 void pic_init_pair(pic_state *);
diff --git a/tools/main.c b/tools/main.c
index 9be04045..ea00782b 100644
--- a/tools/main.c
+++ b/tools/main.c
@@ -9,6 +9,7 @@
 
 #include "picrin.h"
 #include "picrin/pair.h"
+#include "picrin/error.h"
 
 #if PIC_ENABLE_READLINE
 # include <readline/readline.h>