diff --git a/interpreter/Makefile b/interpreter/Makefile
index 78fce53d84..1783a9c4d8 100644
--- a/interpreter/Makefile
+++ b/interpreter/Makefile
@@ -19,7 +19,7 @@ WINMAKE =	winmake.bat
 
 DIRS =		util syntax binary text valid runtime exec script host main tests
 LIBS =		bigarray
-FLAGS = 	-lexflags -ml -cflags '-w +a-4-27-42-44-45 -warn-error +a-3'
+FLAGS = 	-lexflags -ml -cflags '-w +a-4-27-42-44-45-70 -warn-error +a-3'
 OCBA =		ocamlbuild $(FLAGS) $(DIRS:%=-I %)
 OCB =		$(OCBA) $(LIBS:%=-libs %)
 JS =		# set to JS shell command to run JS tests