diff --git a/quad10/fenomens/lab/p4/Makefile b/quad10/fenomens/lab/p4/Makefile
index f02529f..e38dc46 100644
--- a/quad10/fenomens/lab/p4/Makefile
+++ b/quad10/fenomens/lab/p4/Makefile
@@ -20,4 +20,4 @@
 	$(FC) $(FC_FLAGS) -c pbc.f90
 
 clean:
-	rm -rf out data_out *.o
+	rm -rf out *.o