diff --git a/src/slic3r/GUI/DeviceManager.cpp b/src/slic3r/GUI/DeviceManager.cpp
index 1891a7654..7fd7d375e 100644
--- a/src/slic3r/GUI/DeviceManager.cpp
+++ b/src/slic3r/GUI/DeviceManager.cpp
@@ -509,7 +509,7 @@ MachineObject::MachineObject(NetworkAgent* agent, std::string name, std::string
     bed_temp            = 0.0f;
     bed_temp_target     = 0.0f;
     chamber_temp        = 0.0f;
-    chamber_temp_target = 0;
+    chamber_temp_target = 0.0f;
     frame_temp          = 0.0f;
 
     /* ams fileds */
@@ -3132,7 +3132,7 @@ int MachineObject::parse_json(std::string payload)
                     }
                     if (jj.contains("ctt")) {
                         if (jj["ctt"].is_number()) {
-                            chamber_temp_target = jj["ctt"].get<int>();
+                            chamber_temp_target = jj["ctt"].get<float>();
                         }
                     }
                     /* signals */
diff --git a/src/slic3r/GUI/DeviceManager.hpp b/src/slic3r/GUI/DeviceManager.hpp
index ac42c19c7..508703759 100644
--- a/src/slic3r/GUI/DeviceManager.hpp
+++ b/src/slic3r/GUI/DeviceManager.hpp
@@ -514,7 +514,7 @@ public:
     float  bed_temp;
     float  bed_temp_target;
     float  chamber_temp;
-    int    chamber_temp_target;
+    float  chamber_temp_target;
     float  frame_temp;
 
     /* cooling */