diff --git a/scripts/genvimvim.lua b/scripts/genvimvim.lua
index 9135c8e3ab..35e9e8ce00 100644
--- a/scripts/genvimvim.lua
+++ b/scripts/genvimvim.lua
@@ -123,13 +123,12 @@ for line in eval_fd:lines() do
     if line == '};' then
       break
     end
-    local func_name = line:match('^  {"(%w+)",')
-    if func_name then
-      if lld.line_length > 850 then
-        w('\n' .. vimfun_start)
-      end
-      w(' ' .. func_name)
+    local func_name = line:match('^  { "([%w_]+)",')
+    assert(func_name, 'Did not find a function in line: '..line)
+    if lld.line_length > 850 then
+      w('\n' .. vimfun_start)
     end
+    w(' ' .. func_name)
   end
 end
 eval_fd:close()