diff --git a/srcpkgs/unison/template b/srcpkgs/unison/template
index eca87a7d40a..2a91be00c41 100644
--- a/srcpkgs/unison/template
+++ b/srcpkgs/unison/template
@@ -1,7 +1,7 @@
 # Template file for 'unison'
 pkgname="unison"
 version=2.48.4
-revision=3
+revision=4
 short_desc="A file-synchronization tool"
 maintainer="allan <mail@may.mooo.com>"
 license="GPL-3"
@@ -10,8 +10,8 @@ distfiles="http://www.seas.upenn.edu/~bcpierce/unison/download/releases/stable/$
 checksum=30aa53cd671d673580104f04be3cf81ac1e20a2e8baaf7274498739d59e99de8
 hostmakedepends="ocaml"
 nocross=yes
-nopie=yes
 wrksrc="src"
+export OCAMLPARAM="safe-string=0,_"
 
 do_build() {
 	CFLAGS= make UISTYLE=text DEBUGGING=false THREADS=true