diff --git a/hwmonDaemon.py b/hwmonDaemon.py
index 0df448c..be32953 100644
--- a/hwmonDaemon.py
+++ b/hwmonDaemon.py
@@ -931,13 +931,16 @@ class SystemHealthMonitor:
                     
             # Check against known problematic versions
             if firmware_info['manufacturer'] and firmware_info['model']:
-                for model, versions in self.PROBLEMATIC_FIRMWARE[firmware_info['manufacturer']].items():
-                    if model in firmware_info['model'] and firmware_info['version'] in versions:
-                        firmware_info['is_problematic'] = True
-                        firmware_info['known_issues'].append(
-                            f"Known problematic firmware version {firmware_info['version']} "
-                            f"for {firmware_info['model']}"
-                        )
+                # Check if manufacturer exists in our problematic firmware database
+                if firmware_info['manufacturer'] in self.PROBLEMATIC_FIRMWARE:
+                    for model, versions in self.PROBLEMATIC_FIRMWARE[firmware_info['manufacturer']].items():
+                        if model in firmware_info['model'] and firmware_info['version'] in versions:
+                            firmware_info['is_problematic'] = True
+                            firmware_info['known_issues'].append(
+                                f"Known problematic firmware version {firmware_info['version']} "
+                                f"for {firmware_info['model']}"
+                            )
+
             logger.debug(f"=== Firmware Check for {device} ===")
             logger.debug(f"Firmware version: {firmware_info['version']}")
             logger.debug(f"Model: {firmware_info['model']}")