diff --git a/hosts/modules/hal/pine64-pinephone-pro/default.nix b/hosts/modules/hal/pine64-pinephone-pro/default.nix
index bb71a4531..c95c24f02 100644
--- a/hosts/modules/hal/pine64-pinephone-pro/default.nix
+++ b/hosts/modules/hal/pine64-pinephone-pro/default.nix
@@ -37,6 +37,10 @@ in
         name = "rk3399-pinephone-pro";
         dtsFile = ./rk3399-pinephone-pro-battery.dtso;
       }
+      {
+        name = "rk3399-pinephone-pro";
+        dtsFile = ./rk3399-pinephone-pro-lradc-fix.dtso;
+      }
     ];
 
     # this seems to not actually be necessary (unless maybe my *overlay* #include's stuff)
diff --git a/hosts/modules/hal/pine64-pinephone-pro/rk3399-pinephone-pro-lradc-fix.dtso b/hosts/modules/hal/pine64-pinephone-pro/rk3399-pinephone-pro-lradc-fix.dtso
new file mode 100644
index 000000000..0a51a98e8
--- /dev/null
+++ b/hosts/modules/hal/pine64-pinephone-pro/rk3399-pinephone-pro-lradc-fix.dtso
@@ -0,0 +1,15 @@
+// pinephone-pro uses an ADC for the volume button controls.
+// mainline pinephone-pro dts file declares the threshold for vol-down as 0.6V,
+// which is too high and causes most vol-down presses to be misread as vol-up presses.
+// u-boot and megi both change this to 0.4 V.
+
+/dts-v1/;
+/plugin/;
+
+/ {
+        compatible = "pine64,pinephone-pro";
+};
+
+&{/adc-keys/button-down} {
+        press-threshold-microvolt = <400000>;
+};