diff --git a/gnu/packages/fpga.scm b/gnu/packages/fpga.scm
index 420d0aff28..2208775772 100644
--- a/gnu/packages/fpga.scm
+++ b/gnu/packages/fpga.scm
@@ -1,6 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2016 Danny Milosavljevic <dannym@scratchpost.org>
-;;; Copyright © 2016 Theodoros Foradis <theodoros.for@openmailbox.org>
+;;; Copyright © 2016, 2017 Theodoros Foradis <theodoros.for@openmailbox.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -36,6 +36,7 @@ (define-module (gnu packages fpga)
   #:use-module (gnu packages graphviz)
   #:use-module (gnu packages libffi)
   #:use-module (gnu packages linux)
+  #:use-module (gnu packages maths)
   #:use-module (gnu packages perl)
   #:use-module (gnu packages ghostscript)
   #:use-module (gnu packages gperf)
@@ -198,6 +199,8 @@ (define-public yosys
        ("psmisc" ,psmisc)
        ("xdot" ,xdot)
        ("abc" ,abc)))
+    (propagated-inputs
+     `(("z3" ,z3))) ; should be in path for yosys-smtbmc
     (home-page "http://www.clifford.at/yosys/")
     (synopsis "FPGA Verilog RTL synthesizer")
     (description "Yosys synthesizes Verilog-2005.")