diff --git a/posix/ex.c b/posix/ex.c
index 718bafc..369288c 100755
--- a/posix/ex.c
+++ b/posix/ex.c
@@ -452,6 +452,7 @@ int luaopen_ex(lua_State *L)
 	luaL_openlib(L, "ex", ex_iolib, 0);
 	luaL_openlib(L, 0, ex_oslib, 0);
 	luaL_openlib(L, 0, ex_iofile_methods, 0);
+	luaL_openlib(L, 0, ex_process_methods, 0);
 
 	return 1;
 }
diff --git a/w32api/ex.c b/w32api/ex.c
index 4759216..5b22f3d 100755
--- a/w32api/ex.c
+++ b/w32api/ex.c
@@ -522,6 +522,7 @@ int luaopen_ex(lua_State *L)
 	luaL_openlib(L, "ex", ex_iolib, 0);
 	luaL_openlib(L, 0, ex_oslib, 0);
 	luaL_openlib(L, 0, ex_iofile_methods, 0);
+	luaL_openlib(L, 0, ex_process_methods, 0);
 
 	return 1;
 }