diff --git a/lib/modules/SSL.pmod/cipher.pike b/lib/modules/SSL.pmod/cipher.pike
index 3de718c260b64acb8133a0660f3bf70153283a25..6418d1a14b601054ea1182b988f728dc1fd87480 100644
--- a/lib/modules/SSL.pmod/cipher.pike
+++ b/lib/modules/SSL.pmod/cipher.pike
@@ -163,7 +163,7 @@ array lookup(int suite)
     res->bulk_cipher_algorithm = des3;
     res->cipher_type = CIPHER_block;
     res->is_exportable = 0;
-    res->key_material = 16;
+    res->key_material = 24;
     res->iv_size = 8;
     break;
   case CIPHER_idea: