diff --git src/autoconf/configure.ac src/autoconf/configure.ac
index 156e97f4..6d70bf33 100644
--- src/autoconf/configure.ac
+++ src/autoconf/configure.ac
@@ -1410,7 +1410,7 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <mysql.h>
 #include <errmsg.h>
 
-struct MYSQL * foo(void)
+struct st_mysql * foo(void)
 {
     static MYSQL var;