diff --git a/chardev/char-fe.c b/chardev/char-fe.c
index f3530a90e6..474715c5a9 100644
--- a/chardev/char-fe.c
+++ b/chardev/char-fe.c
@@ -29,7 +29,7 @@
 
 #include "chardev/char-fe.h"
 #include "chardev/char-io.h"
-#include "chardev/char-mux.h"
+#include "chardev-internal.h"
 
 int qemu_chr_fe_write(CharBackend *be, const uint8_t *buf, int len)
 {
diff --git a/chardev/char-mux.c b/chardev/char-mux.c
index 46c44af67c..6f980bb836 100644
--- a/chardev/char-mux.c
+++ b/chardev/char-mux.c
@@ -29,7 +29,7 @@
 #include "chardev/char.h"
 #include "sysemu/block-backend.h"
 #include "sysemu/sysemu.h"
-#include "chardev/char-mux.h"
+#include "chardev-internal.h"
 
 /* MUX driver for serial I/O splitting */
 
diff --git a/chardev/char.c b/chardev/char.c
index a0626d04d5..807be52300 100644
--- a/chardev/char.c
+++ b/chardev/char.c
@@ -40,7 +40,7 @@
 #include "qemu/id.h"
 #include "qemu/coroutine.h"
 
-#include "chardev/char-mux.h"
+#include "chardev-internal.h"
 
 /***********************************************************/
 /* character device */
diff --git a/include/chardev/char-mux.h b/chardev/chardev-internal.h
similarity index 96%
rename from include/chardev/char-mux.h
rename to chardev/chardev-internal.h
index 417fe32eed..e0264ac349 100644
--- a/include/chardev/char-mux.h
+++ b/chardev/chardev-internal.h
@@ -1,5 +1,5 @@
 /*
- * QEMU System Emulator
+ * QEMU Character device internals
  *
  * Copyright (c) 2003-2008 Fabrice Bellard
  *
@@ -21,8 +21,8 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
-#ifndef CHAR_MUX_H
-#define CHAR_MUX_H
+#ifndef CHARDEV_INTERNAL_H
+#define CHARDEV_INTERNAL_H
 
 #include "chardev/char.h"
 #include "chardev/char-fe.h"
@@ -30,6 +30,7 @@
 #define MAX_MUX 4
 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2.  */
 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
+
 typedef struct MuxChardev {
     Chardev parent;
     CharBackend *backends[MAX_MUX];