diff --git a/Kernel/TTY/PTYMultiplexer.cpp b/Kernel/TTY/PTYMultiplexer.cpp
index 24420f14b4..ccc0678e43 100644
--- a/Kernel/TTY/PTYMultiplexer.cpp
+++ b/Kernel/TTY/PTYMultiplexer.cpp
@@ -64,7 +64,7 @@ KResultOr<NonnullRefPtr<FileDescription>> PTYMultiplexer::open(int options)
     auto master_index = m_freelist.take_last();
     auto master = adopt(*new MasterPTY(master_index));
 #ifdef PTMX_DEBUG
-    dbgprintf("PTYMultiplexer::open: Vending master %u\n", master->index());
+    dbg() << "PTYMultiplexer::open: Vending master " << master->index();
 #endif
     auto description = FileDescription::create(move(master));
     description->set_rw_mode(options);
@@ -77,7 +77,7 @@ void PTYMultiplexer::notify_master_destroyed(Badge<MasterPTY>, unsigned index)
     LOCKER(m_lock);
     m_freelist.append(index);
 #ifdef PTMX_DEBUG
-    dbgprintf("PTYMultiplexer: %u added to freelist\n", index);
+    dbg() << "PTYMultiplexer: " << index << " added to freelist";
 #endif
 }