diff --git a/lib/amdgpu.pm b/lib/amdgpu.pm
index bb79426..603e8eb 100644
--- a/lib/amdgpu.pm
+++ b/lib/amdgpu.pm
@@ -244,7 +244,7 @@ sub amdgpu_update {
 			# amdgpu alert
 			if(lc($amdgpu->{alerts}->{coretemp_enabled}) eq "y") {
 				my $sensorIndex = 1;
-				$config->{amdgpu_hist_alert1}->{$n} = 0
+				$config->{amdgpu_hist_alert1}->{$n} = 0 if(!$config->{amdgpu_hist_alert1}->{$n});
 				if($sensors[$sensorIndex] >= $amdgpu->{alerts}->{coretemp_threshold} && $config->{amdgpu_hist_alert1}->{$n} < $sensors[$sensorIndex]) {
 					if(-x $amdgpu->{alerts}->{coretemp_script}) {
 						logger("$myself: ALERT: executing script '$amdgpu->{alerts}->{coretemp_script}'.");
@@ -257,7 +257,7 @@ sub amdgpu_update {
 			}
 			if(lc($amdgpu->{alerts}->{memorytemp_enabled}) eq "y") {
 				my $sensorIndex = 2;
-				$config->{amdgpu_hist_alert2}->{$n} = 0
+				$config->{amdgpu_hist_alert2}->{$n} = 0 if(!$config->{amdgpu_hist_alert2}->{$n});
 				if($sensors[$sensorIndex] >= $amdgpu->{alerts}->{memorytemp_threshold} && $config->{amdgpu_hist_alert2}->{$n} < $sensors[$sensorIndex]) {
 					if(-x $amdgpu->{alerts}->{memorytemp_script}) {
 						logger("$myself: ALERT: executing script '$amdgpu->{alerts}->{memorytemp_script}'.");
diff --git a/lib/disk.pm b/lib/disk.pm
index e9f1822..19b3e4f 100644
--- a/lib/disk.pm
+++ b/lib/disk.pm
@@ -267,8 +267,7 @@ sub disk_update {
 
 			# DISK alert
 			if(lc($disk->{alerts}->{realloc_enabled}) eq "y") {
-				$config->{disk_hist_alert1}->{$n} = 0
-					if(!$config->{disk_hist_alert1}->{$n});
+				$config->{disk_hist_alert1}->{$n} = 0 if(!$config->{disk_hist_alert1}->{$n});
 				if($smart1 >= $disk->{alerts}->{realloc_threshold} && $config->{disk_hist_alert1}->{$n} < $smart1) {
 					if(-x $disk->{alerts}->{realloc_script}) {
 						logger("$myself: ALERT: executing script '$disk->{alerts}->{realloc_script}'.");
@@ -280,8 +279,7 @@ sub disk_update {
 				}
 			}
 			if(lc($disk->{alerts}->{pendsect_enabled}) eq "y") {
-				$config->{disk_hist_alert2}->{$n} = 0
-					if(!$config->{disk_hist_alert2}->{$n});
+				$config->{disk_hist_alert2}->{$n} = 0 if(!$config->{disk_hist_alert2}->{$n});
 				if($smart2 >= $disk->{alerts}->{pendsect_threshold} && $config->{disk_hist_alert2}->{$n} < $smart2) {
 					if(-x $disk->{alerts}->{pendsect_script}) {
 						logger("$myself: ALERT: executing script '$disk->{alerts}->{pendsect_script}'.");
diff --git a/lib/nvme.pm b/lib/nvme.pm
index e9095fb..b0c6466 100644
--- a/lib/nvme.pm
+++ b/lib/nvme.pm
@@ -263,7 +263,7 @@ sub nvme_update {
 			# nvme alert
 			if(lc($nvme->{alerts}->{availspare_enabled}) eq "y") {
 				my $smartIndex = 1;
-				$config->{nvme_hist_alert1}->{$n} = 0
+				$config->{nvme_hist_alert1}->{$n} = 0 if(!$config->{nvme_hist_alert1}->{$n});
 				if($smart[$smartIndex] <= $nvme->{alerts}->{availspare_threshold} && $config->{nvme_hist_alert1}->{$n} < $smart[$smartIndex]) {
 					if(-x $nvme->{alerts}->{availspare_script}) {
 						logger("$myself: ALERT: executing script '$nvme->{alerts}->{availspare_script}'.");
@@ -276,7 +276,7 @@ sub nvme_update {
 			}
 			if(lc($nvme->{alerts}->{percentused_enabled}) eq "y") {
 				my $smartIndex = 2;
-				$config->{nvme_hist_alert2}->{$n} = 0
+				$config->{nvme_hist_alert2}->{$n} = 0 if(!$config->{nvme_hist_alert2}->{$n});
 				if($smart[$smartIndex] >= $nvme->{alerts}->{percentused_threshold} && $config->{nvme_hist_alert2}->{$n} < $smart[$smartIndex]) {
 					if(-x $nvme->{alerts}->{percentused_script}) {
 						logger("$myself: ALERT: executing script '$nvme->{alerts}->{percentused_script}'.");