diff --git a/dix/input_priv.h b/dix/input_priv.h
index 517f9ed44..c1275f020 100644
--- a/dix/input_priv.h
+++ b/dix/input_priv.h
@@ -446,4 +446,13 @@ DeviceIntPtr PickKeyboard(ClientPtr client)
 Bool IsPointerDevice(DeviceIntPtr dev)
     _X_ATTRIBUTE_NONNULL_ARG(1);
 
+/*
+ * @brief check whether input device is a keyboard
+ *
+ * @param dev   pointer to device structure
+ * @return TRUE if dev is a keyboard device
+ */
+Bool IsKeyboardDevice(DeviceIntPtr dev)
+    _X_ATTRIBUTE_NONNULL_ARG(1);
+
 #endif /* _XSERVER_INPUT_PRIV_H */
diff --git a/include/dix.h b/include/dix.h
index 27d4888c2..7fb034c3c 100644
--- a/include/dix.h
+++ b/include/dix.h
@@ -288,9 +288,6 @@ typedef struct {
     DeviceIntPtr device;
 } DeviceEventInfoRec;
 
-extern _X_EXPORT Bool
-IsKeyboardDevice(DeviceIntPtr dev);
-
 extern _X_EXPORT Bool
 IsMaster(DeviceIntPtr dev);