diff --git a/data/devices/asus-rog-spatha-x.device b/data/devices/asus-rog-spatha-x.device
new file mode 100644
index 00000000..7bd313f7
--- /dev/null
+++ b/data/devices/asus-rog-spatha-x.device
@@ -0,0 +1,14 @@
+[Device]
+Name=ASUS ROG Spatha X
+DeviceMatch=usb:0b05:1979
+Driver=asus
+
+[Driver/asus]
+Profiles=5
+Buttons=14
+Leds=3
+Dpis=4
+Wireless=1
+DpiRange=100:19000@50
+Quirks=DOUBLE_DPI
+ButtonMapping=f0;f1;f2;e4;e5;e6;e8;e9;ea;eb;ec;ed;ee;ef
diff --git a/src/asus.h b/src/asus.h
index 0d8386c4..7ef24476 100644
--- a/src/asus.h
+++ b/src/asus.h
@@ -17,7 +17,7 @@
 #define ASUS_STATUS_ERROR 0xffaa  /* invalid state/request, disconnected or sleeping */
 
 /* maximum number of buttons across all ASUS devices */
-#define ASUS_MAX_NUM_BUTTON 16
+#define ASUS_MAX_NUM_BUTTON 17
 
 /* maximum number of DPI presets across all ASUS devices */
 /* for 4 DPI devices: 0 - red, 1 - purple, 2 - blue (default), 3 - green */
@@ -147,11 +147,12 @@ static struct asus_button ASUS_BUTTON_MAPPING[] = {
 	{ 0xe1, RATBAG_BUTTON_ACTION_TYPE_BUTTON, 4, 0 },  /* backward, right side */
 	{ 0xe2, RATBAG_BUTTON_ACTION_TYPE_BUTTON, 5, 0 },  /* forward, right side */
 	{ 0xe7, RATBAG_BUTTON_ACTION_TYPE_SPECIAL, 0, RATBAG_BUTTON_ACTION_SPECIAL_RESOLUTION_ALTERNATE },  /* DPI target */
-	{ 0xff, RATBAG_BUTTON_ACTION_TYPE_NONE, 0, 0 },  /* placeholder */
-	{ 0xff, RATBAG_BUTTON_ACTION_TYPE_NONE, 0, 0 },  /* placeholder */
-	{ 0xff, RATBAG_BUTTON_ACTION_TYPE_NONE, 0, 0 },  /* placeholder */
-	{ 0xff, RATBAG_BUTTON_ACTION_TYPE_NONE, 0, 0 },  /* placeholder */
-	{ 0xff, RATBAG_BUTTON_ACTION_TYPE_NONE, 0, 0 },  /* placeholder */
+	{ 0xea, RATBAG_BUTTON_ACTION_TYPE_NONE, 0, 0 },  /* side button A */
+	{ 0xeb, RATBAG_BUTTON_ACTION_TYPE_NONE, 0, 0 },  /* side button B */
+	{ 0xec, RATBAG_BUTTON_ACTION_TYPE_NONE, 0, 0 },  /* side button C */
+	{ 0xed, RATBAG_BUTTON_ACTION_TYPE_NONE, 0, 0 },  /* side button D */
+	{ 0xee, RATBAG_BUTTON_ACTION_TYPE_NONE, 0, 0 },  /* side button E */
+	{ 0xef, RATBAG_BUTTON_ACTION_TYPE_NONE, 0, 0 },  /* side button F */
 };
 
 struct asus_button *
diff --git a/src/driver-asus.c b/src/driver-asus.c
index 3d029bcf..d156867c 100644
--- a/src/driver-asus.c
+++ b/src/driver-asus.c
@@ -55,6 +55,7 @@ static int8_t ASUS_CONFIG_BUTTON_MAPPING[] = {
 	-1,  /* placeholder */
 	-1,  /* placeholder */
 	-1,  /* placeholder */
+	-1,  /* placeholder */
 };
 
 static unsigned int ASUS_LED_MODE[] = {