diff --git a/drivers/accessibility/speakup/speakup_dtlk.h b/drivers/accessibility/speakup/speakup_dtlk.h
index 9c378b58066e..101848edec2e 100644
--- a/drivers/accessibility/speakup/speakup_dtlk.h
+++ b/drivers/accessibility/speakup/speakup_dtlk.h
@@ -1,5 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /* speakup_dtlk.h - header file for speakups DoubleTalk driver. */
+#ifndef _SPEAKUP_DTLK_H
+#define _SPEAKUP_DTLK_H
 
 #define SYNTH_IO_EXTENT	0x02
 #define SYNTH_CLEAR	0x18		/* stops speech */
@@ -61,3 +63,4 @@ struct synth_settings {
 				 */
 	u_char has_indexing;	/* nonzero if indexing is implemented */
 };
+#endif