diff --git a/lib/rsa/rsa-verify.c b/lib/rsa/rsa-verify.c
index 80e8173..f7ae174 100644
--- a/lib/rsa/rsa-verify.c
+++ b/lib/rsa/rsa-verify.c
@@ -445,7 +445,7 @@
 
 	prop.rr = fdt_getprop(blob, node, "rsa,r-squared", NULL);
 
-	if (!prop.num_bits || !prop.modulus) {
+	if (!prop.num_bits || !prop.modulus || !prop.rr) {
 		debug("%s: Missing RSA key info", __func__);
 		return -EFAULT;
 	}