diff --git a/srcpkgs/nmh/template b/srcpkgs/nmh/template
index 529e7d18d3..c018b29919 100644
--- a/srcpkgs/nmh/template
+++ b/srcpkgs/nmh/template
@@ -1,7 +1,7 @@
 # Template file for 'nmh'
 pkgname=nmh
 version=1.6
-revision=4
+revision=5
 build_style=gnu-configure
 configure_args="--sysconfdir=/etc/nmh --libdir=/usr/libexec/nmh --with-cyrus-sasl --with-tls"
 makedepends="ncurses-devel db-devel libsasl-devel libressl-devel"
@@ -39,6 +39,10 @@ homepage="http://www.nongnu.org/nmh/"
 distfiles="http://download.savannah.gnu.org/releases/$pkgname/$pkgname-1.6.tar.gz"
 checksum=29338ae2bc8722fe8a5904b7b601a63943b72b07b6fcda53f3a354edb6a64bc3
 
+pre_build() {
+	make CC="$BUILD_CC" CFLAGS="$BUILD_CFLAGS" sbr/ctype-checked.h
+}
+
 post_install() {
 	vlicense COPYRIGHT LICENSE
 }