diff --git a/Makefile b/Makefile
index 3e8072c..dd579b0 100644
--- a/Makefile
+++ b/Makefile
@@ -210,4 +210,4 @@ clean:
 	@rm -rf $(ALL_OUTPUT_DIRS)
 
 doc:
-  doxygen Doxyfile
\ No newline at end of file
+	doxygen Doxyfile
\ No newline at end of file