diff --git a/meta/classes/sstate.bbclass b/meta/classes/sstate.bbclass
index 8c623271ad..5c88dae6b6 100644
--- a/meta/classes/sstate.bbclass
+++ b/meta/classes/sstate.bbclass
@@ -442,7 +442,7 @@ def sstate_clean(ss, d):
     rm_nohash = ".do_%s" % ss['task']
     for stfile in glob.glob(wildcard_stfile):
         # Keep the sigdata
-        if ".sigdata." in stfile:
+        if ".sigdata." in stfile or ".sigbasedata." in stfile:
             continue
         # Preserve taint files in the stamps directory
         if stfile.endswith('.taint'):