diff --git a/crypto/bn/bn_mont.c b/crypto/bn/bn_mont.c
index aaf57da76402ad3bcec9ee874deb4e93bf9780b6..dd691112c2f77cacfc30c0ea2057dc920d53f2db 100644
--- a/crypto/bn/bn_mont.c
+++ b/crypto/bn/bn_mont.c
@@ -288,7 +288,7 @@ int BN_MONT_CTX_set(BN_MONT_CTX *mont, const BIGNUM *mod, BN_CTX *ctx)
 
 		mont->ri=(BN_num_bits(mod)+(BN_BITS2-1))/BN_BITS2*BN_BITS2;
 		BN_zero(R);
-		BN_set_bit(R,BN_BITS2);			/* R = 2^ri */
+		BN_set_bit(R,BN_BITS2);			/* R */
 
 		buf[0]=mod->d[0]; /* tmod = N mod word size */
 		buf[1]=0;