diff --git a/package/php-apcu/php-apcu.mk b/package/php-apcu/php-apcu.mk
index ce59611d8f..3ac062e772 100644
--- a/package/php-apcu/php-apcu.mk
+++ b/package/php-apcu/php-apcu.mk
@@ -22,4 +22,8 @@ define PHP_APCU_PHPIZE
 endef
 PHP_APCU_PRE_CONFIGURE_HOOKS += PHP_APCU_PHPIZE
 
+ifeq ($(BR2_TOOLCHAIN_HAS_SYNC_4),)
+PHP_APCU_CONF_OPTS += --disable-apcu-rwlocks
+endif
+
 $(eval $(autotools-package))