diff --git a/crypto/rsa_helper.c b/crypto/rsa_helper.c
index 0b66dc8..cad395d 100644
--- a/crypto/rsa_helper.c
+++ b/crypto/rsa_helper.c
@@ -30,7 +30,7 @@
 		return -EINVAL;
 
 	if (fips_enabled) {
-		while (!*ptr && n_sz) {
+		while (n_sz && !*ptr) {
 			ptr++;
 			n_sz--;
 		}