diff --git a/plugins/PostProcessingPlugin/scripts/AnnealAfterPrint.py b/plugins/PostProcessingPlugin/scripts/AnnealAfterPrint.py
index a9cffd9e88..7ca8fac79d 100644
--- a/plugins/PostProcessingPlugin/scripts/AnnealAfterPrint.py
+++ b/plugins/PostProcessingPlugin/scripts/AnnealAfterPrint.py
@@ -151,10 +151,10 @@ class AnnealAfterPrint(Script):
         anneal_code = self.generateAnnealCode(anneal_bed_temp, anneal_chamber_temp, anneal_minutes, initial_beep, final_cooling_temp)
 
         try:
-            end_of_gcode_index = data[-1].index(';End sof Gcode')
+            end_of_gcode_index = data[-1].index(';End of Gcode')
         except ValueError:
             data[-1] += anneal_code + '\n'
         else:
             data[-1] = data[-1][:end_of_gcode_index] + anneal_code + '\n' + data[-1][end_of_gcode_index:]
 
-        return data
\ No newline at end of file
+        return data