diff --git a/include/types.h b/include/types.h
index a0f800ed2..a17f9d10f 100644
--- a/include/types.h
+++ b/include/types.h
@@ -420,7 +420,6 @@ typedef enum opts_type
   OPTS_TYPE_AUX3              = (1ULL << 37),
   OPTS_TYPE_AUX4              = (1ULL << 38),
   OPTS_TYPE_BINARY_HASHFILE   = (1ULL << 39),
-  OPTS_TYPE_PREFERED_THREAD   = (1ULL << 40), // some algorithms (complicated ones with many branches) benefit from this
   OPTS_TYPE_PT_ADD06          = (1ULL << 41),
   OPTS_TYPE_KEYBOARD_MAPPING  = (1ULL << 42),
   OPTS_TYPE_DEEP_COMP_KERNEL  = (1ULL << 43), // if we have to iterate through each hash inside the comp kernel, for example if each hash has to be decrypted separately