diff --git a/sw/in_progress/motor_bench/Makefile b/sw/in_progress/motor_bench/Makefile
index abdecb20cd..0010cfbc93 100644
--- a/sw/in_progress/motor_bench/Makefile
+++ b/sw/in_progress/motor_bench/Makefile
@@ -15,4 +15,4 @@ plot_test:
 
 
 clean:
-	rm *~ motor_bench
\ No newline at end of file
+	rm -f *~ motor_bench
diff --git a/sw/supervision/Makefile b/sw/supervision/Makefile
index f11281fc8f..76100def97 100644
--- a/sw/supervision/Makefile
+++ b/sw/supervision/Makefile
@@ -33,7 +33,7 @@ paparazzicenter.cmo : gtk_pc.cmo gtk_process.cmo pc_common.cmo pc_control_panel.
 pc_control_panel.cmo pc_aircraft.cmo : pc_common.cmo
 
 clean:
-	\rm *.cm* gtk_pc.ml gtk_process.ml .depend paparazzicenter
+	\rm -f *.cm* gtk_pc.ml gtk_process.ml .depend paparazzicenter
 
 #
 # Dependencies