diff --git a/app/include/dt-bindings/gpio_defines.h b/include/dt-bindings/gpio_defines.h
similarity index 100%
rename from app/include/dt-bindings/gpio_defines.h
rename to include/dt-bindings/gpio_defines.h
diff --git a/projects/experimental/volteer/boards/arm/volteer/dts/gpio_defines.h b/projects/experimental/volteer/boards/arm/volteer/dts/gpio_defines.h
deleted file mode 120000
index 1bfd3e1..0000000
--- a/projects/experimental/volteer/boards/arm/volteer/dts/gpio_defines.h
+++ /dev/null
@@ -1 +0,0 @@
-../../../../../../../app/include/dt-bindings/gpio_defines.h
\ No newline at end of file
diff --git a/projects/experimental/volteer/boards/arm/volteer/volteer.dts b/projects/experimental/volteer/boards/arm/volteer/volteer.dts
index 1c087af..5e09fef 100644
--- a/projects/experimental/volteer/boards/arm/volteer/volteer.dts
+++ b/projects/experimental/volteer/boards/arm/volteer/volteer.dts
@@ -6,8 +6,8 @@
 
 /dts-v1/;
 
+#include <dt-bindings/gpio_defines.h>
 #include <nuvoton/npcx7m6fb.dtsi>
-#include <gpio_defines.h>
 
 / {
 	model = "Google Volteer EC";