diff --git a/Module_tail_build.mk b/Module_tail_build.mk
index 34569d10637c..6bd65398b99e 100644
--- a/Module_tail_build.mk
+++ b/Module_tail_build.mk
@@ -203,6 +203,7 @@ $(eval $(call gb_Module_add_moduledirs,tail_build,\
 	xmlscript \
 	xmlsecurity \
 	$(call gb_Helper_optional,XSLTML,xsltml) \
+	$(call gb_Helper_optional,ZLIB,zlib) \
 ))
 
 ifeq ($(MERGELIBS),TRUE)
diff --git a/tail_build/prj/build.lst b/tail_build/prj/build.lst
index 1adb28598775..bc769be03465 100644
--- a/tail_build/prj/build.lst
+++ b/tail_build/prj/build.lst
@@ -1,2 +1,2 @@
-tb      tail_build : EXPAT:expat FONTCONFIG:fontconfig ICU:icu LIBPNG:libpng LIBXML2:libxml2 LIBXSLT:libxslt MOZ:moz NSS:nss OPENSSL:openssl PYTHON:python3 REDLAND:redland XPDF:xpdf ZLIB:zlib external solenv soltools NULL
+tb      tail_build : EXPAT:expat FONTCONFIG:fontconfig ICU:icu LIBPNG:libpng LIBXML2:libxml2 LIBXSLT:libxslt MOZ:moz NSS:nss OPENSSL:openssl PYTHON:python3 REDLAND:redland XPDF:xpdf external solenv soltools NULL
 tb tail_build\prj nmake - all tb_prj   NULL