diff --git a/pid/zone.cpp b/pid/zone.cpp
index 393f6e6..ed8cd0f 100644
--- a/pid/zone.cpp
+++ b/pid/zone.cpp
@@ -211,7 +211,7 @@
 
     for (auto& f : _fanInputs)
     {
-        auto& sensor = _mgr->getSensor(f);
+        auto& sensor = _mgr.getSensor(f);
         ReadReturn r = sensor->read();
         _cachedValuesByName[f] = r.value;
 
@@ -243,7 +243,7 @@
 
     for (auto& t : _thermalInputs)
     {
-        auto& sensor = _mgr->getSensor(t);
+        auto& sensor = _mgr.getSensor(t);
         ReadReturn r = sensor->read();
         int64_t timeout = sensor->GetTimeout();
 
@@ -319,9 +319,9 @@
     }
 }
 
-std::unique_ptr<Sensor>& PIDZone::getSensor(std::string name)
+const std::unique_ptr<Sensor>& PIDZone::getSensor(std::string name)
 {
-    return _mgr->getSensor(name);
+    return _mgr.getSensor(name);
 }
 
 bool PIDZone::manual(bool value)
@@ -344,7 +344,7 @@
 std::map<int64_t, std::shared_ptr<PIDZone>> BuildZones(
             std::map<int64_t, PIDConf>& ZonePids,
             std::map<int64_t, struct zone>& ZoneConfigs,
-            std::shared_ptr<SensorManager> mgr,
+            SensorManager& mgr,
             sdbusplus::bus::bus& ModeControlBus)
 {
     std::map<int64_t, std::shared_ptr<PIDZone>> zones;
@@ -446,7 +446,7 @@
 
 std::map<int64_t, std::shared_ptr<PIDZone>> BuildZonesFromConfig(
             std::string& path,
-            std::shared_ptr<SensorManager> mgr,
+            SensorManager& mgr,
             sdbusplus::bus::bus& ModeControlBus)
 {
     using namespace libconfig;
diff --git a/pid/zone.hpp b/pid/zone.hpp
index c7b52c7..1cf517c 100644
--- a/pid/zone.hpp
+++ b/pid/zone.hpp
@@ -34,7 +34,7 @@
         PIDZone(int64_t zone,
                 float minThermalRpm,
                 float failSafePercent,
-                std::shared_ptr<SensorManager> mgr,
+                const SensorManager& mgr,
                 sdbusplus::bus::bus& bus,
                 const char* objPath,
                 bool defer)
@@ -64,7 +64,7 @@
         float getFailSafePercent(void) const;
         float getMinThermalRpmSetPt(void) const;
 
-        std::unique_ptr<Sensor>& getSensor(std::string name);
+        const std::unique_ptr<Sensor>& getSensor(std::string name);
         void determineMaxRPMRequest(void);
         void updateFanTelemetry(void);
         void updateSensors(void);
@@ -106,7 +106,7 @@
         std::vector<std::string> _fanInputs;
         std::vector<std::string> _thermalInputs;
         std::map<std::string, double> _cachedValuesByName;
-        std::shared_ptr<SensorManager> _mgr;
+        const SensorManager& _mgr;
 
         std::vector<std::unique_ptr<PIDController>> _fans;
         std::vector<std::unique_ptr<PIDController>> _thermals;
@@ -115,10 +115,10 @@
 std::map<int64_t, std::shared_ptr<PIDZone>> BuildZones(
             std::map<int64_t, PIDConf>& ZonePids,
             std::map<int64_t, struct zone>& ZoneConfigs,
-            std::shared_ptr<SensorManager> mgmr,
+            SensorManager& mgmr,
             sdbusplus::bus::bus& ModeControlBus);
 
 std::map<int64_t, std::shared_ptr<PIDZone>> BuildZonesFromConfig(
             std::string& path,
-            std::shared_ptr<SensorManager> mgmr,
+            SensorManager& mgmr,
             sdbusplus::bus::bus& ModeControlBus);