diff --git a/autoload/sign.vim b/autoload/sign.vim
index 291d8b2..ec171bd 100644
--- a/autoload/sign.vim
+++ b/autoload/sign.vim
@@ -97,7 +97,7 @@ function! sign#upsert_new_gitgutter_signs(file_name, modified_lines)
   for line in a:modified_lines
     let line_number = line[0]
     if index(other_signs, line_number) == -1  " don't clobber others' signs
-      let name = 'GitGutterLine' . utility#snake_case_to_camel_case(line[1])
+      let name = utility#highlight_name_for_change(line[1])
       let idx = index(old_gitgutter_signs_line_numbers, line_number)
       if idx == -1  " insert
         let id = sign#next_sign_id()
diff --git a/autoload/utility.vim b/autoload/utility.vim
index 7036fa9..2db11d9 100644
--- a/autoload/utility.vim
+++ b/autoload/utility.vim
@@ -74,14 +74,14 @@ function! utility#differences(hunks)
   return len(a:hunks) != 0
 endfunction
 
-function! utility#snake_case_to_camel_case(text)
+function! utility#highlight_name_for_change(text)
   if a:text ==# 'added'
-    return 'Added'
+    return 'GitGutterLineAdded'
   elseif a:text ==# 'removed'
-    return 'Removed'
+    return 'GitGutterLineRemoved'
   elseif a:text ==# 'modified'
-    return 'Modified'
+    return 'GitGutterLineModified'
   elseif a:text ==# 'modified_removed'
-    return 'ModifiedRemoved'
+    return 'GitGutterLineModifiedRemoved'
   endif
 endfunction