diff --git a/src/prometheus_alert_rules/smart.yaml b/src/prometheus_alert_rules/smart.yaml
index b067fad2..d4a31dfb 100644
--- a/src/prometheus_alert_rules/smart.yaml
+++ b/src/prometheus_alert_rules/smart.yaml
@@ -88,7 +88,7 @@ groups:
 
   - alert: SmartAttributeWarning
     # based on https://www.backblaze.com/blog/what-smart-stats-indicate-hard-drive-failures/
-    expr: smartctl_device_attribute{attribute_id=~"5|187|188|197|198"} > 0
+    expr: smartctl_device_attribute{attribute_id=~"5|187|188|197|198", attribute_value_type="raw"} > 0
     for: 2m
     labels:
       severity: warning
@@ -124,4 +124,4 @@ groups:
         The NVMe drive has reached 90% of its estimated lifetime.
         Note: A value of 100 does not indicate failure. For more details, visit https://charmhub.io/hardware-observer/docs/metrics-and-alerts-smart
           VALUE = {{ $value }}
-          LABELS = {{ $labels }}
\ No newline at end of file
+          LABELS = {{ $labels }}
diff --git a/tests/unit/test_alert_rules/test_smart.yaml b/tests/unit/test_alert_rules/test_smart.yaml
index 8e07ad12..5030e226 100644
--- a/tests/unit/test_alert_rules/test_smart.yaml
+++ b/tests/unit/test_alert_rules/test_smart.yaml
@@ -168,7 +168,7 @@ tests:
 
   - interval: 1m
     input_series:
-      - series: 'smartctl_device_attribute{device="sda", attribute_id="5", attribute_name="Reallocated_Sectors_Count", instance="ubuntu-2"}'
+      - series: 'smartctl_device_attribute{device="sda", attribute_id="5", attribute_name="Reallocated_Sectors_Count", instance="ubuntu-2", attribute_value_type="raw"}'
         values: '2x10'
 
     alert_rule_test:
@@ -181,13 +181,14 @@ tests:
               device: sda
               attribute_id: 5
               attribute_name: Reallocated_Sectors_Count
+              attribute_value_type: raw
             exp_annotations:
               summary: SMART device attribute correlating with drive failure has its raw value greater than zero. (instance ubuntu-2)
               description: |
                 SMART raw value for attribute "Reallocated_Sectors_Count" with id "5"
                 on device "sda" is greater than 0.
                   VALUE = 2
-                  LABELS = map[__name__:smartctl_device_attribute attribute_id:5 attribute_name:Reallocated_Sectors_Count device:sda instance:ubuntu-2]
+                  LABELS = map[__name__:smartctl_device_attribute attribute_id:5 attribute_name:Reallocated_Sectors_Count attribute_value_type:raw device:sda instance:ubuntu-2]
 
   - interval: 1m
     input_series:
@@ -230,4 +231,4 @@ tests:
                 The NVMe drive has reached 90% of its estimated lifetime.
                 Note: A value of 100 does not indicate failure. For more details, visit https://charmhub.io/hardware-observer/docs/metrics-and-alerts-smart
                   VALUE = 95
-                  LABELS = map[__name__:smartctl_device_percentage_used device:nvme instance:ubuntu-4]
\ No newline at end of file
+                  LABELS = map[__name__:smartctl_device_percentage_used device:nvme instance:ubuntu-4]