diff --git a/src/helper/xvb/algorithm.rs b/src/helper/xvb/algorithm.rs
index 3b7020f..1dbe7a4 100644
--- a/src/helper/xvb/algorithm.rs
+++ b/src/helper/xvb/algorithm.rs
@@ -73,13 +73,14 @@ pub(crate) fn calcul_donated_time(
         }
 
         let manual_amount = lock!(gui_api_xvb).stats_priv.runtime_manual_amount as u32;
-        if lock!(gui_api_xvb).stats_priv.runtime_mode == RuntimeMode::ManuallyDonante || avg_hr > 0.0 {
-            spared_time = XVB_TIME_ALGO * manual_amount / (avg_hr as u32);
+        let avg_hr = avg_hr as u32;
+        if lock!(gui_api_xvb).stats_priv.runtime_mode == RuntimeMode::ManuallyDonante && avg_hr > 0 {
+            spared_time = XVB_TIME_ALGO * manual_amount / avg_hr;
             info!("spared_time = 600 * {manual_amount} / {avg_hr} = {spared_time}")
         }
 
-        if lock!(gui_api_xvb).stats_priv.runtime_mode == RuntimeMode::ManuallyKeep || avg_hr > 0.0 { 
-            spared_time = XVB_TIME_ALGO - (XVB_TIME_ALGO * manual_amount / (avg_hr as u32));
+        if lock!(gui_api_xvb).stats_priv.runtime_mode == RuntimeMode::ManuallyKeep && avg_hr > 0 { 
+            spared_time = XVB_TIME_ALGO - (XVB_TIME_ALGO * manual_amount / avg_hr);
             info!("spared_time = 600 * {manual_amount} / {avg_hr} = {spared_time}")
         }