diff --git a/callisto.c b/callisto.c
index 8174373..7ac39a2 100644
--- a/callisto.c
+++ b/callisto.c
@@ -13,7 +13,7 @@ static const luaL_Reg loadedlibs[] = {
 	{CALLISTO_CLLIBNAME,   luaopen_cl},
 	{CALLISTO_ENVLIBNAME,  luaopen_environ},
 	{CALLISTO_EXTLIBNAME,  luaopen_extra},
-	{CALLISTO_FILELIBNAME, luaopen_file},
+	{CALLISTO_FSYSLIBNAME, luaopen_fs},
 	{CALLISTO_JSONLIBNAME, luaopen_json},
 	{CALLISTO_MATHLIBNAME, luaopen_math},
 	{CALLISTO_OSLIBNAME,   luaopen_os},
diff --git a/callisto.h b/callisto.h
index 8db2ae0..dffc12f 100644
--- a/callisto.h
+++ b/callisto.h
@@ -20,7 +20,7 @@
 #define CALLISTO_CLLIBNAME   "cl"
 #define CALLISTO_ENVLIBNAME  "environ"
 #define CALLISTO_EXTLIBNAME  "_G" /* global table */
-#define CALLISTO_FILELIBNAME "file"
+#define CALLISTO_FSYSLIBNAME "fs"
 #define CALLISTO_JSONLIBNAME "json"
 #define CALLISTO_MATHLIBNAME "math"
 #define CALLISTO_OSLIBNAME   "os"
@@ -32,7 +32,7 @@
 int luaopen_cl(lua_State *);
 int luaopen_environ(lua_State *);
 int luaopen_extra(lua_State *);
-int luaopen_file(lua_State *);
+int luaopen_fs(lua_State *);
 int luaopen_json(lua_State *);
 int luaopen_process(lua_State *);
 int luaopen_socket(lua_State *);