diff --git a/changelog/fix_error_for_where_missing_where_joins_called_without_args.md b/changelog/fix_error_for_where_missing_where_joins_called_without_args.md
new file mode 100644
index 0000000000..c03877f7d8
--- /dev/null
+++ b/changelog/fix_error_for_where_missing_where_joins_called_without_args.md
@@ -0,0 +1 @@
+* [#1206](https://github.com/rubocop/rubocop-rails/issues/1206): Fix an error for `Rails/WhereMissing` where join method is called without arguments. ([@fatkodima][])
diff --git a/lib/rubocop/cop/rails/where_missing.rb b/lib/rubocop/cop/rails/where_missing.rb
index 168d2516d1..915fd53301 100644
--- a/lib/rubocop/cop/rails/where_missing.rb
+++ b/lib/rubocop/cop/rails/where_missing.rb
@@ -36,7 +36,7 @@ class WhereMissing < Base
         PATTERN
 
         def on_send(node)
-          return unless node.first_argument.sym_type?
+          return unless node.first_argument&.sym_type?
 
           root_receiver = root_receiver(node)
           where_node_and_argument(root_receiver) do |where_node, where_argument|
diff --git a/spec/rubocop/cop/rails/where_missing_spec.rb b/spec/rubocop/cop/rails/where_missing_spec.rb
index fde3476564..532d09104b 100644
--- a/spec/rubocop/cop/rails/where_missing_spec.rb
+++ b/spec/rubocop/cop/rails/where_missing_spec.rb
@@ -315,6 +315,12 @@ def test
         Foo.left_joins(bar: :foo).where(bars: { id: nil })
       RUBY
     end
+
+    it 'does not register an offense when using `left_joins` without arguments' do
+      expect_no_offenses(<<~RUBY)
+        Foo.left_joins(left_joins).where(bars: { id: nil })
+      RUBY
+    end
   end
 
   context 'Rails 6.0', :rails60 do