diff --git a/net-misc/packetdrill/packetdrill-20160707.recipe b/net-misc/packetdrill/packetdrill-20160707.recipe
index ad086d925..da5d806f4 100644
--- a/net-misc/packetdrill/packetdrill-20160707.recipe
+++ b/net-misc/packetdrill/packetdrill-20160707.recipe
@@ -14,7 +14,7 @@ CHECKSUM_SHA256="5b184075673299c08c7772a2a552e97758f3c2ec46c4bdacb37336452ba8562
 SOURCE_DIR="packetdrill-$srcGitRev"
 PATCHES="packetdrill-$portVersion.patchset"
 
-ARCHITECTURES="?x86_gcc2 ?x86 ?x86_64"
+ARCHITECTURES="!x86_gcc2 !x86 !x86_64"
 
 PROVIDES="
 	packetdrill = $portVersion