diff --git a/package/php-apcu/Config.in b/package/php-apcu/Config.in
index 6338980222..f8e1eb17bb 100644
--- a/package/php-apcu/Config.in
+++ b/package/php-apcu/Config.in
@@ -1,6 +1,10 @@
 config BR2_PACKAGE_PHP_APCU
 	bool "php-apcu"
+	depends on BR2_TOOLCHAIN_HAS_THREADS
 	help
 	  APCu is an in-memory key-value store for PHP.
 
 	  https://pecl.php.net/package/APCu
+
+comment "php-apcu needs a toolchain w/ threads"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS