diff --git a/include/ck_ht.h b/include/ck_ht.h
index 7664ab7..5c9c37a 100644
--- a/include/ck_ht.h
+++ b/include/ck_ht.h
@@ -53,6 +53,8 @@ enum ck_ht_mode {
 #define CK_HT_PP
 #define CK_HT_KEY_LENGTH ((sizeof(void *) * 8) - CK_MD_VMA_BITS)
 #define CK_HT_KEY_MASK   ((1U << CK_HT_KEY_LENGTH) - 1)
+#else
+#define CK_HT_KEY_LENGTH 65535
 #endif
 
 struct ck_ht_entry {