diff --git a/src/register.hh b/src/register.hh
deleted file mode 100644
index 40cd068d..00000000
--- a/src/register.hh
+++ /dev/null
@@ -1,23 +0,0 @@
-#ifndef register_hh_INCLUDED
-#define register_hh_INCLUDED
-
-#include "array_view.hh"
-#include "string.hh"
-
-namespace Kakoune
-{
-
-class Context;
-
-class Register
-{
-public:
-    virtual ~Register() {}
-    virtual Register& operator=(ConstArrayView<String> values) = 0;
-
-    virtual ConstArrayView<String> values(const Context& context) = 0;
-};
-
-}
-
-#endif // register_hh_INCLUDED
diff --git a/src/register_manager.hh b/src/register_manager.hh
index 52217374..df829763 100644
--- a/src/register_manager.hh
+++ b/src/register_manager.hh
@@ -1,9 +1,10 @@
 #ifndef register_manager_hh_INCLUDED
 #define register_manager_hh_INCLUDED
 
-#include "register.hh"
+#include "array_view.hh"
 #include "utils.hh"
 #include "unordered_map.hh"
+#include "string.hh"
 #include "vector.hh"
 
 #include <functional>
@@ -11,6 +12,17 @@
 namespace Kakoune
 {
 
+class Context;
+
+class Register
+{
+public:
+    virtual ~Register() {}
+    virtual Register& operator=(ConstArrayView<String> values) = 0;
+
+    virtual ConstArrayView<String> values(const Context& context) = 0;
+};
+
 using RegisterRetriever = std::function<Vector<String, MemoryDomain::Registers> (const Context&)>;
 
 class RegisterManager : public Singleton<RegisterManager>