diff --git a/conf/machine/include/sysmobts.inc b/conf/machine/include/sysmobts.inc
index 0ccad1f..de327c4 100644
--- a/conf/machine/include/sysmobts.inc
+++ b/conf/machine/include/sysmobts.inc
@@ -41,3 +41,6 @@ MACHINE_EXTRA_RDEPENDS = "\
 
 require conf/machine/include/tune-arm926ejs.inc
 require conf/machine/include/dm6446.inc
+
+# we tune for armv5te but it ends up as armv5e on pyro and probably earlier. Help it.
+ARMPKGSFX_THUMB="t"