diff --git a/monitor/system.cpp b/monitor/system.cpp
index aa80bd4..f3863b0 100644
--- a/monitor/system.cpp
+++ b/monitor/system.cpp
@@ -183,7 +183,7 @@
         _sensorMatch.clear();
         subscribeSensorsToServices();
     }
-    catch (std::runtime_error& re)
+    catch (const std::runtime_error& re)
     {
         log<level::ERR>("Error reloading config, no config changes made",
                         entry("LOAD_ERROR=%s", re.what()));
diff --git a/monitor/tach_sensor.cpp b/monitor/tach_sensor.cpp
index 9bf9932..0c2d4d9 100644
--- a/monitor/tach_sensor.cpp
+++ b/monitor/tach_sensor.cpp
@@ -61,7 +61,7 @@
         value =
             util::SDBusPlus::getProperty<T>(bus, path, interface, propertyName);
     }
-    catch (std::exception& e)
+    catch (const std::exception& e)
     {
         phosphor::logging::log<phosphor::logging::level::ERR>(e.what());
     }
@@ -102,7 +102,7 @@
                 util::OPERATIONAL_STATUS_INTF, util::FUNCTIONAL_PROPERTY);
         }
     }
-    catch (util::DBusError& e)
+    catch (const util::DBusError& e)
     {
         log<level::DEBUG>(e.what());
     }