diff --git a/crypto/des/str2key.c b/crypto/des/str2key.c
index f69bef3a6ee66360607e49349413c41899915939..70f1d83e07a5625c17c997974518eaa160c89172 100644
--- a/crypto/des/str2key.c
+++ b/crypto/des/str2key.c
@@ -86,7 +86,9 @@ void DES_string_to_key(const char *str, DES_cblock *key)
 		}
 #endif
 	DES_set_odd_parity(key);
-	DES_set_key_unchecked(key,&ks);
+	if(DES_is_weak_key(key))
+	    (*key)[7] ^= 0xF0;
+	DES_set_key(key,&ks);
 	DES_cbc_cksum((const unsigned char*)str,key,length,&ks,key);
 	memset(&ks,0,sizeof(ks));
 	DES_set_odd_parity(key);
@@ -145,9 +147,13 @@ void DES_string_to_2keys(const char *str, DES_cblock *key1, DES_cblock *key2)
 #endif
 	DES_set_odd_parity(key1);
 	DES_set_odd_parity(key2);
-	DES_set_key_unchecked(key1,&ks);
+	if(DES_is_weak_key(key1))
+	    (*key1)[7] ^= 0xF0;
+	DES_set_key(key1,&ks);
 	DES_cbc_cksum((const unsigned char*)str,key1,length,&ks,key1);
-	DES_set_key_unchecked(key2,&ks);
+	if(DES_is_weak_key(key2))
+	    (*key2)[7] ^= 0xF0;
+	DES_set_key(key2,&ks);
 	DES_cbc_cksum((const unsigned char*)str,key2,length,&ks,key2);
 	memset(&ks,0,sizeof(ks));
 	DES_set_odd_parity(key1);