diff --git a/Formula/icarus-verilog.rb b/Formula/icarus-verilog.rb
index b46d3038f8..051e8eddda 100644
--- a/Formula/icarus-verilog.rb
+++ b/Formula/icarus-verilog.rb
@@ -3,6 +3,7 @@ class IcarusVerilog < Formula
   homepage "http://iverilog.icarus.com/"
   url "ftp://icarus.com/pub/eda/verilog/v10/verilog-10.2.tar.gz"
   sha256 "96dedbddb12d375edb45a144a926a3ba1e3e138d6598b18e7d79f2ae6de9e500"
+  revision 1
 
   bottle do
     sha256 "81e937d3d6a5f7b22271e79b73618e96db1e52ee491eaf3506671cfb5891c129" => :high_sierra
@@ -15,12 +16,15 @@ class IcarusVerilog < Formula
     depends_on "autoconf" => :build
   end
 
+  # parser is subtly broken when processed with an old version of bison
+  depends_on "bison" => :build
+
   def install
     system "autoconf" if build.head?
     system "./configure", "--prefix=#{prefix}"
     # https://github.com/steveicarus/iverilog/issues/85
     ENV.deparallelize
-    system "make", "install"
+    system "make", "install", "BISON=#{Formula["bison"].opt_bin}/bison"
   end
 
   test do
@@ -35,5 +39,10 @@ class IcarusVerilog < Formula
     EOS
     system bin/"iverilog", "-otest", "test.v"
     assert_equal "Boop", shell_output("./test").chomp
+
+    # test syntax errors do not cause segfaults
+    (testpath/"error.v").write "error;"
+    assert_equal "-:1: error: variable declarations must be contained within a module.",
+      shell_output("#{bin}/iverilog error.v 2>&1", 1).chomp
   end
 end