diff --git a/lib/pgsync/sync.rb b/lib/pgsync/sync.rb
index d80fd085..17210bbf 100644
--- a/lib/pgsync/sync.rb
+++ b/lib/pgsync/sync.rb
@@ -37,6 +37,8 @@ def perform
       print_description("From", source)
       print_description("To", destination)
 
+      raise Error, "Destination must be different from source" if source.url == destination.url
+
       if (opts[:preserve] || opts[:overwrite]) && destination.server_version_num < 90500
         raise Error, "Postgres 9.5+ is required for --preserve and --overwrite"
       end
diff --git a/test/sync_test.rb b/test/sync_test.rb
index e4f573b8..80c1302c 100644
--- a/test/sync_test.rb
+++ b/test/sync_test.rb
@@ -63,6 +63,10 @@ def test_preserve_no_primary_key
     assert_error "No primary key", "chapters --preserve", config: true
   end
 
+  def test_same_source_destination
+    assert_error "Destination must be different from source", "--from pgsync_test1 --to pgsync_test1", config: true
+  end
+
   def test_no_shared_fields
     assert_prints "authors: No fields to copy", "authors", config: true
   end