diff --git a/srcpkgs/sessreg/template b/srcpkgs/sessreg/template
index 4337171006f..75b51695e86 100644
--- a/srcpkgs/sessreg/template
+++ b/srcpkgs/sessreg/template
@@ -13,4 +13,4 @@ distfiles="${XORG_SITE}/app/$pkgname-$version.tar.bz2"
 checksum=551177657835e0902b5eee7b19713035beaa1581bbd3c6506baa553e751e017c
 
 # musl does not define _WTMPX_FILE, use WTMP_FILE instead.
-CFLAGS="-D_WTMPX_FILE=WTMP_FILE"
+CFLAGS="-D_WTMPX_FILE=WTMP_FILE -D_PATH_WTMPX=_PATH_WTMP"