diff --git a/sshbn.c b/sshbn.c
index 724cf301..6768204b 100644
--- a/sshbn.c
+++ b/sshbn.c
@@ -1461,6 +1461,7 @@ Bignum bignum_from_decimal(const char *decimal)
 
         tmp = bigmul(result, Ten);
         tmp2 = bignum_from_long(*decimal - '0');
+        freebn(result);
         result = bigadd(tmp, tmp2);
         freebn(tmp);
         freebn(tmp2);