diff --git a/gnu/packages/zwave.scm b/gnu/packages/zwave.scm
index a30199ec02..e74e8eb8b8 100644
--- a/gnu/packages/zwave.scm
+++ b/gnu/packages/zwave.scm
@@ -116,7 +116,7 @@ knowledge of the Z-Wave protocol.")
            (lambda _
              (substitute* "binding.gyp"
                (("std=c\\+\\+11")
-                "std=c++17"))))
+                "std=c++20"))))
          (replace 'build
            ;; For some reason, `npm install` doesn't build
            ;; the addon automatically, so we do it explicitly here.