diff --git a/sshprime.c b/sshprime.c
index 4d79aacd..070eb98a 100644
--- a/sshprime.c
+++ b/sshprime.c
@@ -1382,6 +1382,7 @@ Bignum primegen(int bits, int modulus, int residue, Bignum factor,
 	 * It didn't. Therefore, w is a witness for the
 	 * compositeness of p.
 	 */
+	freebn(wqp);
 	freebn(p);
 	freebn(pm1);
 	freebn(q);