diff --git a/chsrc.c b/chsrc.c
index d4a8435..1480b86 100644
--- a/chsrc.c
+++ b/chsrc.c
@@ -53,7 +53,7 @@ does_the_program_exist (char* check_cmd, char* progname)
  * @param  target  目标名
  * @param  input   如果用户输入 default 或者 def，则选择第一个源
  */
-#define lets_find_mirror(s, input) does_the_input_mirror_exist(s##_sources, s##_sources_n, #s+3, input)
+#define lets_find_mirror(s, input) does_the_input_mirror_exist(s##_sources, s##_sources_n, (char*)#s+3, input)
 int
 does_the_input_mirror_exist (source_info* sources, size_t size, char* target, char* input)
 {
@@ -158,7 +158,7 @@ test_speed_url (const char* url)
 }
 
 
-#define lets_test_speed(s) lets_test_speed_(s##_sources, s##_sources_n, #s+3)
+#define lets_test_speed(s) lets_test_speed_(s##_sources, s##_sources_n, (char*)#s+3)
 int
 lets_test_speed_ (source_info* sources, size_t size, const char* target)
 {
@@ -1486,8 +1486,7 @@ print_supported_sources_for_target (source_info sources[])
 
 
 
-
-int
+void
 print_help ()
 {
   puts(xy_strjoin(3, "chsrc: Change Source (GPLv3) ",
diff --git a/chsrc.h b/chsrc.h
index d47d07f..9a34766 100644
--- a/chsrc.h
+++ b/chsrc.h
@@ -443,7 +443,7 @@ os_netbsd_sources[] = {
  *
  * TODO: 1. 源并不完整，且未经测试是否有效
  */
-os_openeular_sources[] = {
+os_openeuler_sources[] = {
   {&Ali,       "https://mirrors.aliyun.com/openeuler/"},
   {&Bfsu,      "https://mirrors.bfsu.edu.cn/openeuler/"},
   {&Ustc,      "https://mirrors.ustc.edu.cn/openeuler/"},