diff --git a/srcpkgs/nspr/template b/srcpkgs/nspr/template
index 69fc07632b3..00f41692a78 100644
--- a/srcpkgs/nspr/template
+++ b/srcpkgs/nspr/template
@@ -6,6 +6,7 @@ build_style=gnu-configure
 build_wrksrc="nspr"
 configure_args="--libdir=/usr/lib --includedir=/usr/include/nspr
  --enable-optimize --disable-debug --with-pthreads"
+makedepends="zlib-devel"
 short_desc="NetScape Portable Runtime"
 maintainer="Juan RP <xtraeme@gmail.com>"
 homepage="http://www.mozilla.org/projects/nspr/"