diff --git a/var/spack/repos/builtin/packages/libxdmcp/package.py b/var/spack/repos/builtin/packages/libxdmcp/package.py
index f3fbc87ef4b..711bd148324 100644
--- a/var/spack/repos/builtin/packages/libxdmcp/package.py
+++ b/var/spack/repos/builtin/packages/libxdmcp/package.py
@@ -17,3 +17,4 @@ class Libxdmcp(AutotoolsPackage):
     depends_on('xproto', type='build')
     depends_on('pkgconfig', type='build')
     depends_on('util-macros', type='build')
+    depends_on('libbsd')