diff --git a/include/hash.h b/include/hash.h
index b982d14..d3b62eb 100644
--- a/include/hash.h
+++ b/include/hash.h
@@ -16,7 +16,7 @@ static inline uint64_t ror64(uint64_t word, unsigned int shift)
 	return (word >> shift) | (word << (64 - shift));
 }
 
-uint64_t dhash(char *data, int size);
+uint64_t dhash(void *data, int size);
 
 
 #endif //MKSPARSE_HASH_H
diff --git a/src/hash.c b/src/hash.c
index ace0388..6e861c9 100644
--- a/src/hash.c
+++ b/src/hash.c
@@ -6,7 +6,7 @@
 #include <stdint.h>
 #include <stdio.h>
 
-uint64_t dhash(char *data, int size){
+uint64_t dhash(void *data, int size){
 	uint64_t *i64 = (uint64_t*)data;
 	char *i8;
 	uint64_t hash = 0xbeefcafe;