diff --git a/import-layers/yocto-poky/meta/classes/upstream-version-is-even.bbclass b/import-layers/yocto-poky/meta/classes/upstream-version-is-even.bbclass
index 89556ed..256c752 100644
--- a/import-layers/yocto-poky/meta/classes/upstream-version-is-even.bbclass
+++ b/import-layers/yocto-poky/meta/classes/upstream-version-is-even.bbclass
@@ -2,4 +2,4 @@
 # accepts even minor versions (i.e. 3.0.x, 3.2.x, 3.4.x, etc.)
 # This scheme is used by Gnome and a number of other projects
 # to signify stable releases vs development releases.
-UPSTREAM_CHECK_REGEX = "(?P<pver>\d+\.(\d*[02468])+(\.\d+)+)"
+UPSTREAM_CHECK_REGEX = "[^\d\.](?P<pver>\d+\.(\d*[02468])+(\.\d+)+)\.tar"