diff --git a/boards/arm/pinnacle_100_dvk/pinnacle_100_dvk.dts b/boards/arm/pinnacle_100_dvk/pinnacle_100_dvk.dts
index b88005d1a4c..883f2bff1ab 100644
--- a/boards/arm/pinnacle_100_dvk/pinnacle_100_dvk.dts
+++ b/boards/arm/pinnacle_100_dvk/pinnacle_100_dvk.dts
@@ -116,7 +116,6 @@
 		mdm-wake-gpios = <&gpio1 13 0>;
 		mdm-pwr-on-gpios = <&gpio1 2 0>;
 		mdm-fast-shutd-gpios = <&gpio1 14 0>;
-		mdm-uart-dtr-gpios = <&gpio0 24 0>;
 		mdm-vgpio-gpios = <&gpio1 11 0>;
 		mdm-uart-dsr-gpios = <&gpio0 25 0>;
 		mdm-uart-cts-gpios = <&gpio0 15 0>;
diff --git a/dts/bindings/modem/swir,hl7800.yaml b/dts/bindings/modem/swir,hl7800.yaml
index 8411f8dbf4e..7ee2389f4f6 100644
--- a/dts/bindings/modem/swir,hl7800.yaml
+++ b/dts/bindings/modem/swir,hl7800.yaml
@@ -30,10 +30,6 @@ properties:
         type: phandle-array
         required: true
 
-    mdm-uart-dtr-gpios:
-        type: phandle-array
-        required: true
-
     mdm-vgpio-gpios:
         type: phandle-array
         required: true
diff --git a/tests/drivers/build_all/modem/uart.dtsi b/tests/drivers/build_all/modem/uart.dtsi
index 2384b8d0183..d9ccedf6717 100644
--- a/tests/drivers/build_all/modem/uart.dtsi
+++ b/tests/drivers/build_all/modem/uart.dtsi
@@ -13,7 +13,6 @@ test_hl7800: hl7800 {
 	mdm-wake-gpios = <&test_gpio 0 0>;
 	mdm-pwr-on-gpios = <&test_gpio 0 0>;
 	mdm-fast-shutd-gpios = <&test_gpio 0 0>;
-	mdm-uart-dtr-gpios = <&test_gpio 0 0>;
 	mdm-uart-dsr-gpios = <&test_gpio 0 0>;
 	mdm-uart-cts-gpios = <&test_gpio 0 0>;
 	mdm-gpio6-gpios = <&test_gpio 0 0>;