diff --git a/var/spack/repos/builtin/packages/dcap/package.py b/var/spack/repos/builtin/packages/dcap/package.py
index 6be67d31a62..91a083f3a36 100644
--- a/var/spack/repos/builtin/packages/dcap/package.py
+++ b/var/spack/repos/builtin/packages/dcap/package.py
@@ -25,6 +25,7 @@ class Dcap(AutotoolsPackage):
     depends_on("m4", type="build")
 
     depends_on("openssl")
+    depends_on("libxcrypt")
     depends_on("zlib-api")
 
     variant("plugins", default=True, description="Build plugins")