diff --git a/Makefile b/Makefile
index bba1d4ccf44493ef249c860dcce3bbbac12a8c18..aab89947a099b5c73a39d2f8d4acd2556f4ec8a2 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 NAME = slu-delay-calculator-gui
-MAIN = slu-delay-calculator.py
+MAIN = SluDelayCalculator.py
 
 DIRNAME = $(NAME:-gui=)
 MODNAME = $(MAIN:.py=)