diff --git a/Machines/Sinclair/ZX8081/Keyboard.cpp b/Machines/Sinclair/ZX8081/Keyboard.cpp
index d3e25f381..02e681a44 100644
--- a/Machines/Sinclair/ZX8081/Keyboard.cpp
+++ b/Machines/Sinclair/ZX8081/Keyboard.cpp
@@ -8,7 +8,7 @@
 
 #include "Keyboard.hpp"
 
-using namespace ZX8081;
+using namespace Sinclair::ZX8081;
 
 uint16_t KeyboardMapper::mapped_key_for_key(Inputs::Keyboard::Key key) const {
 #define BIND(source, dest)	case Inputs::Keyboard::Key::source:	return ZX8081::dest
diff --git a/Machines/Sinclair/ZX8081/Video.cpp b/Machines/Sinclair/ZX8081/Video.cpp
index 3ccd75266..da1e72109 100644
--- a/Machines/Sinclair/ZX8081/Video.cpp
+++ b/Machines/Sinclair/ZX8081/Video.cpp
@@ -10,7 +10,7 @@
 
 #include <algorithm>
 
-using namespace ZX8081;
+using namespace Sinclair::ZX8081;
 
 namespace {