diff --git a/app-text/ghostscript-gpl/ghostscript-gpl-9.18.ebuild b/app-text/ghostscript-gpl/ghostscript-gpl-9.18.ebuild
index d049c3f595a95..1970779a3d87b 100644
--- a/app-text/ghostscript-gpl/ghostscript-gpl-9.18.ebuild
+++ b/app-text/ghostscript-gpl/ghostscript-gpl-9.18.ebuild
@@ -124,6 +124,10 @@ src_prepare() {
 	sed -i \
 		-e "/^ZLIBDIR=/s:=.*:=${T}:" \
 		configure.ac || die
+	# Some files depend on zlib.h directly.  Redirect them. #573248
+	sed -i \
+		-e '/^zlib_h/s:=.*:=:' \
+		base/lib.mak || die
 
 	# search path fix
 	# put LDFLAGS after BINDIR, bug #383447