diff --git a/include/dt-bindings/pinctrl/am33xx.h b/include/dt-bindings/pinctrl/am33xx.h
index a3fddd4..469e032 100644
--- a/include/dt-bindings/pinctrl/am33xx.h
+++ b/include/dt-bindings/pinctrl/am33xx.h
@@ -2,6 +2,9 @@
  * This header provides constants specific to AM33XX pinctrl bindings.
  */
 
+#ifndef _DT_BINDINGS_PINCTRL_AM33XX_H
+#define _DT_BINDINGS_PINCTRL_AM33XX_H
+
 #include <include/dt-bindings/pinctrl/omap.h>
 
 /* am33xx specific mux bit defines */
@@ -35,3 +38,5 @@
 #undef PIN_OFF_INPUT_PULLDOWN
 #undef PIN_OFF_WAKEUPENABLE
 
+#endif
+
diff --git a/include/dt-bindings/pinctrl/omap.h b/include/dt-bindings/pinctrl/omap.h
index 370df3f..edbd250 100644
--- a/include/dt-bindings/pinctrl/omap.h
+++ b/include/dt-bindings/pinctrl/omap.h
@@ -5,6 +5,9 @@
  * Copyright (C) 2009-2010 Texas Instruments
  */
 
+#ifndef _DT_BINDINGS_PINCTRL_OMAP_H
+#define _DT_BINDINGS_PINCTRL_OMAP_H
+
 /* 34xx mux mode options for each pin. See TRM for options */
 #define MUX_MODE0	0
 #define MUX_MODE1	1
@@ -48,3 +51,5 @@
 #define PIN_OFF_INPUT_PULLDOWN	(OFF_EN | OFF_PULL_EN)
 #define PIN_OFF_WAKEUPENABLE	WAKEUP_EN
 
+#endif
+