diff --git a/Makefile b/Makefile
index b23ce492..b1140afa 100644
--- a/Makefile
+++ b/Makefile
@@ -99,7 +99,7 @@ serve:
 
 .PHONY: progress
 progress:
-	@python3 -c 'import sys; print("{:.1%}".format(int(sys.argv[1]) / int(sys.argv[2])))'  \
+	@$(PYTHON) -c 'import sys; print("{:.1%}".format(int(sys.argv[1]) / int(sys.argv[2])))'  \
 	$(shell msgcat *.po */*.po | msgattrib --translated | grep -c '^msgid') \
 	$(shell msgcat *.po */*.po | grep -c '^msgid')