diff --git a/Makefile b/Makefile
index efbe1032646d1675ea54930883dec6b7da75868c..14a2aea729c87526a76c642cfdcc090770d060ed 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 NAME = sl-decimators-gui
-MAIN = sl-decimators.py
+MAIN = SlDecimators.py
 
 DIRNAME = $(NAME:-gui=)
 MODNAME = $(MAIN:.py=)