diff --git a/include/cyclone/ck_ht_hash.h b/include/cyclone/ck_ht_hash.h
index be4f08e6..f8cb705e 100644
--- a/include/cyclone/ck_ht_hash.h
+++ b/include/cyclone/ck_ht_hash.h
@@ -32,7 +32,6 @@
  */
 
 #include <ck_stdint.h>
-#include <ck_string.h>
 
 //-----------------------------------------------------------------------------
 // MurmurHash3 was written by Austin Appleby, and is placed in the public