diff --git a/lua/oil/mutator/init.lua b/lua/oil/mutator/init.lua
index 4ab659d..1d1b181 100644
--- a/lua/oil/mutator/init.lua
+++ b/lua/oil/mutator/init.lua
@@ -463,6 +463,7 @@ M.try_write_changes = function(confirm, cb)
   local was_modified = vim.bo.modified
   local buffers = view.get_all_buffers()
   local all_diffs = {}
+  ---@type table<integer, oil.ParseError[]>
   local all_errors = {}
 
   mutation_in_progress = true
diff --git a/lua/oil/mutator/parser.lua b/lua/oil/mutator/parser.lua
index e3823a1..43a95d0 100644
--- a/lua/oil/mutator/parser.lua
+++ b/lua/oil/mutator/parser.lua
@@ -187,7 +187,7 @@ M.parse = function(bufnr)
       name = name:lower()
     end
     if seen_names[name] then
-      table.insert(errors, { message = "Duplicate filename", lnum = i - 1, col = 0 })
+      table.insert(errors, { message = "Duplicate filename", lnum = i - 1, end_lnum = i, col = 0 })
     else
       seen_names[name] = true
     end
@@ -200,6 +200,7 @@ M.parse = function(bufnr)
         table.insert(errors, {
           message = err,
           lnum = i - 1,
+          end_lnum = i,
           col = 0,
         })
         goto continue
@@ -221,6 +222,7 @@ M.parse = function(bufnr)
         table.insert(errors, {
           message = message,
           lnum = i - 1,
+          end_lnum = i,
           col = 0,
         })
         goto continue
@@ -273,6 +275,7 @@ M.parse = function(bufnr)
         table.insert(errors, {
           message = "Paths cannot start with '/'",
           lnum = i - 1,
+          end_lnum = i,
           col = 0,
         })
         goto continue
diff --git a/tests/parser_spec.lua b/tests/parser_spec.lua
index 7487263..527e821 100644
--- a/tests/parser_spec.lua
+++ b/tests/parser_spec.lua
@@ -110,6 +110,7 @@ describe("parser", function()
       {
         message = "Malformed ID at start of line",
         lnum = 0,
+        end_lnum = 1,
         col = 0,
       },
     }, errors)
@@ -126,6 +127,7 @@ describe("parser", function()
       {
         message = "No filename found",
         lnum = 0,
+        end_lnum = 1,
         col = 0,
       },
     }, errors)
@@ -143,6 +145,7 @@ describe("parser", function()
       {
         message = "Duplicate filename",
         lnum = 1,
+        end_lnum = 2,
         col = 0,
       },
     }, errors)
@@ -161,6 +164,7 @@ describe("parser", function()
       {
         message = "Duplicate filename",
         lnum = 1,
+        end_lnum = 2,
         col = 0,
       },
     }, errors)