diff --git a/mozilla/modules/libjar/Makefile.in b/mozilla/modules/libjar/Makefile.in
index 28fa488e7a8..acabf8e0774 100644
--- a/mozilla/modules/libjar/Makefile.in
+++ b/mozilla/modules/libjar/Makefile.in
@@ -40,4 +40,6 @@ EXPORTS = zipfile.h
 
 EXPORTS := $(addprefix $(srcdir)/, $(EXPORTS))
 
+EXTRA_DSO_LDOPTS = $(ZLIB_LIBS)
+
 include $(topsrcdir)/config/rules.mk