diff --git a/libmariadb/mariadb_lib.c b/libmariadb/mariadb_lib.c
index a028c321..f1053dd3 100644
--- a/libmariadb/mariadb_lib.c
+++ b/libmariadb/mariadb_lib.c
@@ -81,7 +81,7 @@
 #define strncasecmp _strnicmp
 #endif
 
-#define ASYNC_CONTEXT_DEFAULT_STACK_SIZE (4096*15)
+#define ASYNC_CONTEXT_DEFAULT_STACK_SIZE (256*1024)
 #define MA_RPL_VERSION_HACK "5.5.5-"
 
 #define CHARSET_NAME_LEN 64