diff --git a/README.md b/README.md
index ed24766..4a0fabd 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,7 @@ Stop Klipper:
 
 Link the file in the Klipper directory (adjust the paths as needed):
 
-    ln -s klipper-led_effect/led_effect.py ~/klipper/klippy/extras/led_effect.py
+    ln -s klipper-led_effect/src/led_effect.py ~/klipper/klippy/extras/led_effect.py
 
 Start Klipper:
 
diff --git a/src/led_effect.py b/src/led_effect.py
index cbf92f4..949764e 100644
--- a/src/led_effect.py
+++ b/src/led_effect.py
@@ -930,7 +930,7 @@ def nextFrame(self, eventtime):
             if heaterTarget > 0.0 and heaterCurrent > 0.0:
                 if (heaterCurrent >= self.effectRate):
                     if (heaterCurrent <= heaterTarget-2):
-                        s = int(((heaterCurrent - self.effectRate) / heaterTarget) * 200)
+                        s = int(((heaterCurrent - self.effectRate) / (heaterTarget - self.effectRate)) * 200)
                         s = min(len(self.thisFrame)-1,s)
                         return self.thisFrame[s]
                     elif self.effectCutoff > 0: