diff --git a/lua/lean/init.lua b/lua/lean/init.lua
index 69080887..a6f79401 100644
--- a/lua/lean/init.lua
+++ b/lua/lean/init.lua
@@ -204,7 +204,9 @@ function lean.use_suggested_mappings(bufnr)
   local opts = { buffer = bufnr or 0 }
   for _, each in ipairs(lean.mappings) do
     local lhs, rhs, more_opts = unpack(each)
-    vim.keymap.set(each.mode or 'n', lhs, rhs, vim.tbl_extend('error', opts, more_opts))
+    if vim.fn['mapcheck'](lhs, each.mode or 'n') == '' then
+      vim.keymap.set(each.mode or 'n', lhs, rhs, vim.tbl_extend('error', opts, more_opts))
+    end
   end
 end
 
diff --git a/lua/lean/tui.lua b/lua/lean/tui.lua
index 561705a6..f3707925 100644
--- a/lua/lean/tui.lua
+++ b/lua/lean/tui.lua
@@ -607,9 +607,11 @@ function BufRenderer:new(obj)
   )
 
   for key, event in pairs(obj.keymaps or {}) do
-    vim.keymap.set('n', key, function()
-      new_renderer:event(event)
-    end, { buffer = obj.buffer.bufnr, desc = ('Fire a %s event.'):format(event) })
+    if vim.fn['mapcheck'](key, 'n') == '' then
+      vim.keymap.set('n', key, function()
+        new_renderer:event(event)
+      end, { buffer = obj.buffer.bufnr, desc = ('Fire a %s event.'):format(event) })
+    end
   end
 
   return new_renderer