diff --git a/app/Fans.cs b/app/Fans.cs
index f7d4780d..242df75c 100644
--- a/app/Fans.cs
+++ b/app/Fans.cs
@@ -207,6 +207,8 @@ namespace GHelper
 
             ToggleNavigation(0);
 
+            if (Program.acpi.DeviceGet(AsusACPI.DevsCPUFanCurve) < 0) buttonCalibrate.Visible = false;
+
             FormClosed += Fans_FormClosed;
 
         }