diff --git a/package/gensio/Config.in b/package/gensio/Config.in
index f874d1a469..fd0e476970 100644
--- a/package/gensio/Config.in
+++ b/package/gensio/Config.in
@@ -1,6 +1,7 @@
 config BR2_PACKAGE_GENSIO
 	bool "gensio"
 	depends on BR2_USE_MMU # fork()
+	depends on BR2_TOOLCHAIN_HAS_ATOMIC
 	help
 	  A library to abstract stream I/O like serial port, TCP,
 	  telnet, UDP, SSL, IPMI SOL, etc.
diff --git a/package/ser2net/Config.in b/package/ser2net/Config.in
index 3d110b70f2..1859d42c8f 100644
--- a/package/ser2net/Config.in
+++ b/package/ser2net/Config.in
@@ -1,6 +1,7 @@
 config BR2_PACKAGE_SER2NET
 	bool "ser2net"
 	depends on BR2_USE_MMU # fork()
+	depends on BR2_TOOLCHAIN_HAS_ATOMIC # gensio
 	select BR2_PACKAGE_GENSIO
 	select BR2_PACKAGE_LIBYAML
 	help