diff --git a/src/buffer_manager.cc b/src/buffer_manager.cc
index 688e864a..9826de13 100644
--- a/src/buffer_manager.cc
+++ b/src/buffer_manager.cc
@@ -79,7 +79,7 @@ void BufferManager::backup_modified_buffers()
     for (auto& buf : m_buffers)
     {
         if ((buf->flags() & Buffer::Flags::File) and buf->is_modified()
-            and !(buf->flags() & Buffer::Flags::ReadOnly))
+            and not (buf->flags() & Buffer::Flags::ReadOnly))
             write_buffer_to_backup_file(*buf);
     }
 }
diff --git a/src/commands.cc b/src/commands.cc
index 6104975c..fa61a8c4 100644
--- a/src/commands.cc
+++ b/src/commands.cc
@@ -242,7 +242,7 @@ void write_buffer(const ParametersParser& parser, Context& context, const ShellC
     // if the buffer is in read-only mode and we try to save it directly
     // or we try to write to it indirectly using e.g. a symlink, throw an error
     if ((context.buffer().flags() & Buffer::Flags::ReadOnly)
-        && (parser.positional_count() == 0 || real_path(parser[0]) == buffer.name()))
+        and (parser.positional_count() == 0 or real_path(parser[0]) == buffer.name()))
         throw runtime_error("cannot overwrite the buffer when in readonly mode");
 
     auto filename = parser.positional_count() == 0 ?