diff --git a/modules/libjar/standalone/Makefile.in b/modules/libjar/standalone/Makefile.in
index 45076b8f88f..57bdc848fe1 100644
--- a/modules/libjar/standalone/Makefile.in
+++ b/modules/libjar/standalone/Makefile.in
@@ -30,7 +30,7 @@ include $(srcdir)/../objs.mk
 
 MODULE		= jar
 LIBRARY_NAME	= jar$(VERSION_NUMBER)_s
-REQUIRES	= xpcom string caps
+REQUIRES	= xpcom string caps $(ZLIB_REQUIRES)
 
 #DEP_XPIDLSRCS	= $(MODULES_LIBJAR_XPIDLSRCS)
 #EXPORTS		= $(MODULES_LIBJAR_LEXPORTS)