diff --git a/Makefile b/Makefile
index a5f660c..ed0a751 100644
--- a/Makefile
+++ b/Makefile
@@ -22,11 +22,11 @@ clean-engine:
 	$(RM) build/engine
 
 build/ZMusic:
-        mkdir -p build/ZMusic
-        cd build/ZMusic && cmake ../../ZMusic
+	mkdir -p build/ZMusic
+	cd build/ZMusic && cmake ../../ZMusic
 	$(MAKE) -C build/ZMuxic
 
 build/engine/gzdoom: build/ZMusic
-        mkdir -p build/engine
+	mkdir -p build/engine
 	cd build/engine && cmake -DZMUSIC_LIBRARIES=../ZMusic/source/libzmusic.so -DZMUSIC_INCLUDE_DIR=../../ZMusic/include ../../engine
 	$(MAKE) -C build/engine