diff --git a/dev-libs/boost/boost165-1.65.1.recipe b/dev-libs/boost/boost165-1.65.1.recipe
index f3cd57a14..f20324b59 100644
--- a/dev-libs/boost/boost165-1.65.1.recipe
+++ b/dev-libs/boost/boost165-1.65.1.recipe
@@ -15,7 +15,7 @@ SOURCE_DIR="boost_${portVersion//./_}"
 PATCHES="boost-$portVersion.patchset"
 
 ARCHITECTURES="!x86_gcc2 x86 x86_64"
-SECONDARY_ARCHITECTURES="?x86"
+SECONDARY_ARCHITECTURES="x86"
 
 libVersion="$portVersion compat >= 1.65.0"