diff --git a/src/audio/module_adapter/module/volume/volume.c b/src/audio/module_adapter/module/volume/volume.c
index 5e1417db8..8c0fc92e8 100644
--- a/src/audio/module_adapter/module/volume/volume.c
+++ b/src/audio/module_adapter/module/volume/volume.c
@@ -467,9 +467,9 @@ static int set_volume_ipc4(struct vol_data *cd, uint32_t const channel,
 			   uint64_t const curve_duration)
 {
 	/* update target volume in peak_regs */
-	cd->peak_regs.target_volume_[channel] = target_volume;
+	cd->peak_regs.target_volume[channel] = target_volume;
 	/* update peak meter in peak_regs */
-	cd->peak_regs.peak_meter_[channel] = 0;
+	cd->peak_regs.peak_meter[channel] = 0;
 
 	/* init target volume */
 	cd->tvolume[channel] = target_volume;
@@ -992,7 +992,7 @@ static int volume_get_config(struct processing_module *mod,
 	switch (config_id) {
 	case IPC4_VOLUME:
 		for (i = 0; i < cd->channels; i++) {
-			uint32_t volume = cd->peak_regs.target_volume_[i];
+			uint32_t volume = cd->peak_regs.target_volume[i];
 
 			cdata[i].channel_id = i;
 			cdata[i].target_volume = convert_volume_ipc3_to_ipc4(volume);
@@ -1055,7 +1055,7 @@ static void volume_update_current_vol_ipc4(struct vol_data *cd)
 	assert(cd);
 
 	for (i = 0; i < cd->channels; i++)
-		cd->peak_regs.current_volume_[i] = cd->volume[i];
+		cd->peak_regs.current_volume[i] = cd->volume[i];
 #endif
 }
 
diff --git a/src/audio/module_adapter/module/volume/volume_generic.c b/src/audio/module_adapter/module/volume/volume_generic.c
index 8251667cf..498339b02 100644
--- a/src/audio/module_adapter/module/volume/volume_generic.c
+++ b/src/audio/module_adapter/module/volume/volume_generic.c
@@ -92,7 +92,7 @@ static void vol_s24_to_s24(struct processing_module *mod, struct input_stream_bu
 				y0 += nch;
 			}
 #if CONFIG_COMP_PEAK_VOL
-			cd->peak_regs.peak_meter_[j] = tmp;
+			cd->peak_regs.peak_meter[j] = tmp;
 #endif
 		}
 		remaining_samples -= n;
@@ -158,7 +158,7 @@ static void vol_s32_to_s32(struct processing_module *mod, struct input_stream_bu
 				y0 += nch;
 			}
 #if CONFIG_COMP_PEAK_VOL
-			cd->peak_regs.peak_meter_[j] = tmp;
+			cd->peak_regs.peak_meter[j] = tmp;
 #endif
 		}
 		remaining_samples -= n;
@@ -222,7 +222,7 @@ static void vol_s16_to_s16(struct processing_module *mod, struct input_stream_bu
 				y0 += nch;
 			}
 #if CONFIG_COMP_PEAK_VOL
-			cd->peak_regs.peak_meter_[j] = tmp;
+			cd->peak_regs.peak_meter[j] = tmp;
 #endif
 		}
 		remaining_samples -= n;
diff --git a/src/audio/module_adapter/module/volume/volume_hifi3.c b/src/audio/module_adapter/module/volume/volume_hifi3.c
index ba02fff9a..727a74a50 100644
--- a/src/audio/module_adapter/module/volume/volume_hifi3.c
+++ b/src/audio/module_adapter/module/volume/volume_hifi3.c
@@ -47,7 +47,7 @@ static void vol_store_gain(struct vol_data *cd, const int channels_count)
 static inline void peak_vol_calc(struct vol_data *cd, ae_f32x2 out_sample, size_t channel)
 {
 #if CONFIG_COMP_PEAK_VOL
-	cd->peak_regs.peak_meter_[channel] = AE_MAX32(out_sample, cd->peak_regs.peak_meter_[channel]);
+	cd->peak_regs.peak_meter[channel] = AE_MAX32(out_sample, cd->peak_regs.peak_meter[channel]);
 #endif
 }
 
diff --git a/src/include/ipc4/fw_reg.h b/src/include/ipc4/fw_reg.h
index 89761d5cb..9ddb63bb2 100644
--- a/src/include/ipc4/fw_reg.h
+++ b/src/include/ipc4/fw_reg.h
@@ -71,9 +71,9 @@ struct ipc4_pipeline_registers {
 
 #define IPC4_PV_MAX_SUPPORTED_CHANNELS 8
 struct ipc4_peak_volume_regs {
-	uint32_t peak_meter_[IPC4_PV_MAX_SUPPORTED_CHANNELS];
-	uint32_t current_volume_[IPC4_PV_MAX_SUPPORTED_CHANNELS];
-	uint32_t target_volume_[IPC4_PV_MAX_SUPPORTED_CHANNELS];
+	uint32_t peak_meter[IPC4_PV_MAX_SUPPORTED_CHANNELS];
+	uint32_t current_volume[IPC4_PV_MAX_SUPPORTED_CHANNELS];
+	uint32_t target_volume[IPC4_PV_MAX_SUPPORTED_CHANNELS];
 } __attribute__((packed, aligned(4)));
 
 struct ipc4_llp_reading {