diff --git a/package/libkcapi/Config.in b/package/libkcapi/Config.in
index 7397cfe800..1dbcdc381b 100644
--- a/package/libkcapi/Config.in
+++ b/package/libkcapi/Config.in
@@ -1,5 +1,6 @@
 config BR2_PACKAGE_LIBKCAPI
 	bool "libkcapi"
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4
 	help
 	  Linux Kernel Crypto API userspace interface library