diff --git a/extra/crypto/rsa/rsa.factor b/extra/crypto/rsa/rsa.factor
index 50ea84fd39..f4ef4687b5 100644
--- a/extra/crypto/rsa/rsa.factor
+++ b/extra/crypto/rsa/rsa.factor
@@ -21,7 +21,7 @@ C: <rsa> rsa
 CONSTANT: public-key 65537
 
 : rsa-primes ( numbits -- p q )
-    2/ 2 unique-primes first2 ;
+    2/ 2 swap unique-primes first2 ;
 
 : modulus-phi ( numbits -- n phi ) 
     #! Loop until phi is not divisible by the public key.