--- a/src/sparsehash/internal/sparseconfig.h
+++ b/src/sparsehash/internal/sparseconfig.h
@@ -7,10 +7,12 @@
 #define GOOGLE_NAMESPACE ::google
 
 /* the location of the header defining hash functions */
-#define HASH_FUN_H <functional>
+#ifndef HASH_FUN_H
+#define HASH_FUN_H <util/generic/hash.h>
+#endif
 
 /* the namespace of the hash<> function */
-#define HASH_NAMESPACE std
+#define HASH_NAMESPACE 
 
 /* Define to 1 if you have the <inttypes.h> header file. */
 #define HAVE_INTTYPES_H 1
@@ -37,7 +39,7 @@
 /* #undef HAVE___UINT16 */
 
 /* The system-provided hash function including the namespace. */
-#define SPARSEHASH_HASH HASH_NAMESPACE::hash
+#define SPARSEHASH_HASH HASH_NAMESPACE::THash
 
 /* Stops putting the code inside the Google namespace */
 #define _END_GOOGLE_NAMESPACE_ }