diff --git a/sci-electronics/verilator/verilator-3.864.recipe b/sci-electronics/verilator/verilator-3.864.recipe
index f9f5d8957..313f8bbae 100644
--- a/sci-electronics/verilator/verilator-3.864.recipe
+++ b/sci-electronics/verilator/verilator-3.864.recipe
@@ -13,7 +13,7 @@ SOURCE_URI="http://www.veripool.org/ftp/verilator-3.864.tgz"
 CHECKSUM_SHA256="f6734c2aa33946357d5abfd9211b4206297f9adf07dfc3186cbbba0d8c8842af"
 PATCHES="verilator-$portVersion.patchset"
 
-ARCHITECTURES="x86_gcc2 x86"
+ARCHITECTURES="x86_gcc2 x86 x86_64"
 SECONDARY_ARCHITECTURES="x86"
 
 PROVIDES="