diff --git a/meta/classes/deb-dl-dir.bbclass b/meta/classes/deb-dl-dir.bbclass
index 24b2dec7..e12144ef 100644
--- a/meta/classes/deb-dl-dir.bbclass
+++ b/meta/classes/deb-dl-dir.bbclass
@@ -64,7 +64,8 @@ debsrc_download() {
     trap "rm -f ${avail} ${wanted}" EXIT
 
     # List all packages known to apt
-    apt-cache -o Dir=${rootfs} dumpavail | debsrc_source_version_filter > ${avail}
+    apt-cache -o APT::Architecture=${DISTRO_ARCH} -o Dir=${rootfs} dumpavail \
+    | debsrc_source_version_filter > ${avail}
 
     # Use apt-ftparchive to scan all .deb files found in the download directory
     # and get the <source> <version> pairs that we wish to download