diff --git a/pkg/cifra/Makefile.dep b/pkg/cifra/Makefile.dep
new file mode 100644
index 0000000000..57d8d54026
--- /dev/null
+++ b/pkg/cifra/Makefile.dep
@@ -0,0 +1,2 @@
+# Cifra is only supported by 32 bit architectures
+FEATURES_REQUIRED += arch_32bit