diff --git a/dev-cpp/tbb/tbb-2018.3.recipe b/dev-cpp/tbb/tbb-2018.3.recipe
index 3f3a7b24e..9f906af1e 100644
--- a/dev-cpp/tbb/tbb-2018.3.recipe
+++ b/dev-cpp/tbb/tbb-2018.3.recipe
@@ -12,8 +12,8 @@ CHECKSUM_SHA256="23793c8645480148e9559df96b386b780f92194c80120acce79fcdaae0d81f4
 SOURCE_DIR="tbb-${portVersion/./_U}"
 PATCHES="tbb-${portVersion/./_U}.patchset"
 
-ARCHITECTURES="!x86_gcc2 ?x86 x86_64"
-SECONDARY_ARCHITECTURES="?x86"
+ARCHITECTURES="!x86_gcc2 x86 x86_64"
+SECONDARY_ARCHITECTURES="x86"
 
 PROVIDES="
 	tbb$secondaryArchSuffix = $portVersion
@@ -51,7 +51,11 @@ defineDebugInfoPackage tbb$secondaryArchSuffix \
 
 BUILD()
 {
-	make $jobArgs
+	if [ "$effectiveTargetArchitecture" != x86_64 ]; then
+		make arch=ia32 $jobArgs
+	else
+		make $jobArgs
+	fi
 }
 
 INSTALL()