diff --git a/include/hash.h b/include/hash.h
index 5a03d1e..9a5a09c 100644
--- a/include/hash.h
+++ b/include/hash.h
@@ -7,7 +7,8 @@
 #include <openssl/sha.h>
 
 typedef enum {
-    FileObject,
+    BaseFileObject,
+    DiffObject,
     TreeObject,
     LogObject
 } ObjectType;
diff --git a/src/hash.c b/src/hash.c
index 0ba0c99..41e4423 100644
--- a/src/hash.c
+++ b/src/hash.c
@@ -20,9 +20,10 @@ void object_hash(ObjectType obj_type, char* content, char* hex_hash) {
     char header[64];
     int header_len;
     switch (obj_type) {
-        case FileObject: header_len = snprintf(header, sizeof(header), "file %zu", content_len); break;
-        case TreeObject: header_len = snprintf(header, sizeof(header), "tree %zu", content_len); break;
-        case LogObject:  header_len = snprintf(header, sizeof(header),  "log %zu", content_len); break;
+        case BaseFileObject: header_len = snprintf(header, sizeof(header), "basefile %zu", content_len); break;
+        case DiffObject:     header_len = snprintf(header, sizeof(header), "diff %zu",     content_len); break;
+        case TreeObject:     header_len = snprintf(header, sizeof(header), "tree %zu",     content_len); break;
+        case LogObject:      header_len = snprintf(header, sizeof(header),  "log %zu",     content_len); break;
         default: header_len = 0; break;
     }
     header[header_len] = '\0';