diff --git a/autoload/gitgutter/utility.vim b/autoload/gitgutter/utility.vim
index ec2696e..162f547 100644
--- a/autoload/gitgutter/utility.vim
+++ b/autoload/gitgutter/utility.vim
@@ -252,7 +252,8 @@ function! gitgutter#utility#base_path(bufnr)
   " If we already know the original path at this diff base, return it.
   let basepath = gitgutter#utility#getbufvar(a:bufnr, 'basepath', '')
   if !empty(basepath)
-    let [base, bpath] = split(basepath, ':', 1)
+    let i = strridx(basepath, ':')
+    let [base, bpath] = [basepath[0:i-1], basepath[i+1:]]
     if base == diffbase
       return gitgutter#utility#shellescape(bpath)
     endif
diff --git a/test/test_gitgutter.vim b/test/test_gitgutter.vim
index 98bcb22..a9b2340 100644
--- a/test/test_gitgutter.vim
+++ b/test/test_gitgutter.vim
@@ -196,6 +196,20 @@ function Test_filename_with_equals()
 endfunction
 
 
+function Test_filename_with_colon()
+  call system('touch fix:ture.txt && git add fix:ture.txt')
+  edit fix:ture.txt
+  normal ggo*
+  call s:trigger_gitgutter()
+
+  let expected = [
+        \ {'lnum': 1, 'name': 'GitGutterLineAdded'},
+        \ {'lnum': 2, 'name': 'GitGutterLineAdded'}
+        \ ]
+  call s:assert_signs(expected, 'fix:ture.txt')
+endfunction
+
+
 function Test_filename_with_square_brackets()
   call system('touch fix[tu]re.txt && git add fix[tu]re.txt')
   edit fix[tu]re.txt