diff --git a/drivers/wdm/audio/drivers/ac97/prophnd.cpp b/drivers/wdm/audio/drivers/ac97/prophnd.cpp
index 714e89da8d786..d9141c0eab454 100644
--- a/drivers/wdm/audio/drivers/ac97/prophnd.cpp
+++ b/drivers/wdm/audio/drivers/ac97/prophnd.cpp
@@ -171,6 +171,13 @@ NTSTATUS CAC97MiniportTopology::GetDBValues
         // These nodes could have 5bit or 6bit controls, so we first
         // have to check this.
         case NODE_MASTEROUT_VOLUME:
+            // ReactOS change: use the same Decibel range as for WaveOut,
+            // to fix incorrect volume level change scaling.
+            *plMaximum = 0x000C0000;   // 12 dB
+            *plMinimum = 0xFFDD8000;   // -34.5 dB
+            *puStep    = 0x00018000;   // 1.5 dB
+            break;
+
         case NODE_FRONT_VOLUME:
         case NODE_HPOUT_VOLUME:
         case NODE_SURROUND_VOLUME: