diff --git a/debian/rules b/debian/rules
index f859264..17f632a 100755
--- a/debian/rules
+++ b/debian/rules
@@ -8,7 +8,7 @@ build-arch: build-stamp
 
 build-stamp:
 	$(MAKE) $(shell dpkg-buildflags --export=cmdline)
-	$(MAKE) test
+	LC_ALL=C $(MAKE) test
 	touch build-stamp
 
 clean: