diff --git a/include/picrin.h b/include/picrin.h
index 9ba312ef..a8c912f1 100644
--- a/include/picrin.h
+++ b/include/picrin.h
@@ -177,7 +177,7 @@ struct pic_proc *pic_compile(pic_state *, pic_value, struct pic_lib *);
 pic_value pic_macroexpand(pic_state *, pic_value, struct pic_lib *);
 
 void pic_in_library(pic_state *, pic_value);
-struct pic_lib *pic_make_library(pic_state *, pic_value);
+struct pic_lib *pic_open_library(pic_state *, pic_value);
 struct pic_lib *pic_find_library(pic_state *, pic_value);
 
 #define pic_deflibrary(pic, spec)                                       \
@@ -185,7 +185,7 @@ struct pic_lib *pic_find_library(pic_state *, pic_value);
 #define pic_deflibrary_helper__(pic, i, prev_lib, spec)                 \
   for (int i = 0; ! i; )                                                \
     for (struct pic_lib *prev_lib; ! i; )                               \
-      for ((prev_lib = pic->lib), pic_make_library(pic, pic_read_cstr(pic, spec)), pic_in_library(pic, pic_read_cstr(pic, spec)); ! i++; pic->lib = prev_lib)
+      for ((prev_lib = pic->lib), pic_open_library(pic, pic_read_cstr(pic, spec)), pic_in_library(pic, pic_read_cstr(pic, spec)); ! i++; pic->lib = prev_lib)
 
 void pic_import(pic_state *, pic_value);
 void pic_export(pic_state *, pic_sym);
diff --git a/lib.c b/lib.c
index defb4b4b..898b0b6b 100644
--- a/lib.c
+++ b/lib.c
@@ -11,7 +11,7 @@
 #include "picrin/string.h"
 
 struct pic_lib *
-pic_make_library(pic_state *pic, pic_value name)
+pic_open_library(pic_state *pic, pic_value name)
 {
   struct pic_lib *lib;
   struct pic_senv *senv;
@@ -239,7 +239,7 @@ pic_lib_define_library(pic_state *pic)
 
   pic_get_args(pic, "o*", &spec, &argc, &argv);
 
-  pic_make_library(pic, spec);
+  pic_open_library(pic, spec);
 
   pic_try {
     pic_in_library(pic, spec);
diff --git a/state.c b/state.c
index ccf53a80..4810af25 100644
--- a/state.c
+++ b/state.c
@@ -144,8 +144,8 @@ pic_open(int argc, char *argv[], char **envp)
   pic_init_reader(pic);
 
   /* standard libraries */
-  pic->PICRIN_BASE = pic_make_library(pic, pic_read_cstr(pic, "(picrin base)"));
-  pic->PICRIN_USER = pic_make_library(pic, pic_read_cstr(pic, "(picrin user)"));
+  pic->PICRIN_BASE = pic_open_library(pic, pic_read_cstr(pic, "(picrin base)"));
+  pic->PICRIN_USER = pic_open_library(pic, pic_read_cstr(pic, "(picrin user)"));
   pic->lib = pic->PICRIN_USER;
 
   pic_init_core(pic);