diff --git a/package/sane-airscan/Config.in b/package/sane-airscan/Config.in
index f35e244ea6..b7cf224741 100644
--- a/package/sane-airscan/Config.in
+++ b/package/sane-airscan/Config.in
@@ -1,5 +1,9 @@
 config BR2_PACKAGE_SANE_AIRSCAN
 	bool "sane-airscan"
+	depends on !BR2_STATIC_LIBS # avahi, gnutls, sane-backends
+	depends on BR2_TOOLCHAIN_HAS_THREADS # avahi, dbus
+	depends on BR2_USE_WCHAR # avahi, gnutls
+	depends on BR2_USE_MMU # dbus, sane-backends
 	select BR2_PACKAGE_AVAHI
 	select BR2_PACKAGE_AVAHI_DAEMON # needed to get avahi-client
 	select BR2_PACKAGE_DBUS # needed by avahi to get avahi-client
@@ -18,3 +22,8 @@ config BR2_PACKAGE_SANE_AIRSCAN
 	  support "driverless" scanning.
 
 	  https://github.com/alexpevzner/sane-airscan
+
+comment "sane-airscan needs a toolchain w/ wchar, dynamic library, threads"
+	depends on BR2_USE_MMU
+	depends on !BR2_USE_WCHAR || BR2_STATIC_LIBS || \
+		!BR2_TOOLCHAIN_HAS_THREADS