diff --git a/pkgs/applications/networking/ike/default.nix b/pkgs/applications/networking/ike/default.nix
index 3baa1352a80..0b0491ffb86 100644
--- a/pkgs/applications/networking/ike/default.nix
+++ b/pkgs/applications/networking/ike/default.nix
@@ -28,6 +28,11 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake flex bison makeWrapper ];
   buildInputs = [ openssl libedit qt4 nettools iproute ];
 
+  postPatch = ''
+    # fix build with bison3
+    sed -i 's/define "parser_class_name"/define parser_class_name/' source/iked/conf.parse.yy
+  '';
+
   configurePhase = ''
     mkdir -p $out/{bin,sbin,lib}
     cmake -DQTGUI=YES -DETCDIR=$out/etc -DLIBDIR=$out/lib -DSBINDIR=$out/sbin -DBINDIR=$out/bin \
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 14a0a72f99d..b0b6b2d210b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -19556,7 +19556,7 @@ in
     stdenv = gccStdenv;
   };
 
-  ike = callPackage ../applications/networking/ike { bison = bison2; };
+  ike = callPackage ../applications/networking/ike { };
 
   ikiwiki = callPackage ../applications/misc/ikiwiki {
     inherit (perlPackages.override { pkgs = pkgs // { imagemagick = imagemagickBig;}; }) PerlMagick;