diff --git a/ext/mysqli/php_mysqli_structs.h b/ext/mysqli/php_mysqli_structs.h
index 4ab7adcba7b..17609857017 100644
--- a/ext/mysqli/php_mysqli_structs.h
+++ b/ext/mysqli/php_mysqli_structs.h
@@ -56,6 +56,10 @@
 #define WE_HAD_MBSTATE_T
 #endif
 
+#if defined(ulong) && !defined(HAVE_ULONG)
+#define HAVE_ULONG
+#endif
+
 #include <my_global.h>
 
 #if !defined(HAVE_MBRLEN) && defined(WE_HAD_MBRLEN)