diff --git a/bitbake/lib/bb/build.py b/bitbake/lib/bb/build.py
index c4c8aeb645..e807a0948c 100644
--- a/bitbake/lib/bb/build.py
+++ b/bitbake/lib/bb/build.py
@@ -723,7 +723,7 @@ def make_stamp(task, d, file_name = None):
     for mask in cleanmask:
         for name in glob.glob(mask):
             # Preserve sigdata files in the stamps directory
-            if "sigdata" in name:
+            if "sigdata" in name or "sigbasedata" in name:
                 continue
             # Preserve taint files in the stamps directory
             if name.endswith('.taint'):