diff --git a/configure.in b/configure.in
index 8d762ced367..d1d28601dc7 100644
--- a/configure.in
+++ b/configure.in
@@ -4164,7 +4164,7 @@ MOZ_XSLT_STANDALONE=
 MOZ_XTF=1
 MOZ_XUL=1
 MOZ_XUL_APP=1
-MOZ_ZIPWRITER=0
+MOZ_ZIPWRITER=
 NS_PRINTING=1
 NECKO_COOKIES=1
 NECKO_DISK_CACHE=1