diff --git a/include/hash.h b/include/hash.h
index cbaa80b..a0d1025 100644
--- a/include/hash.h
+++ b/include/hash.h
@@ -10,7 +10,6 @@ typedef enum {
     BaseFileObject,
     FileDiffObject,
     TreeObject,
-    TreeDiffObject,
     LogObject
 } ObjectType;
 
diff --git a/src/hash.c b/src/hash.c
index 27c3d90..2545276 100644
--- a/src/hash.c
+++ b/src/hash.c
@@ -23,7 +23,6 @@ void object_hash(ObjectType obj_type, char* content, char* hex_hash) {
         case BaseFileObject: header_len = snprintf(header, sizeof(header), "basefile %zu", content_len); break;
         case FileDiffObject: header_len = snprintf(header, sizeof(header), "filediff %zu", content_len); break;
         case TreeObject:     header_len = snprintf(header, sizeof(header), "tree %zu",     content_len); break;
-        case TreeDiffObject: header_len = snprintf(header, sizeof(header), "treediff %zu", content_len); break;
         case LogObject:      header_len = snprintf(header, sizeof(header), "log %zu",      content_len); break;
         default: header_len = 0; break;
     }