diff --git a/gnu/packages/wm.scm b/gnu/packages/wm.scm
index cd5655f1d1..05642cf450 100644
--- a/gnu/packages/wm.scm
+++ b/gnu/packages/wm.scm
@@ -1212,6 +1212,7 @@ (define-public polybar
      `(("alsa-lib" ,alsa-lib)
        ("cairo" ,cairo)
        ("i3-wm" ,i3-wm)
+       ("jsoncpp" ,jsoncpp)
        ("libmpdclient" ,libmpdclient)
        ("libnl" ,libnl)
        ("libxcb" ,libxcb)