diff --git a/CHANGES b/CHANGES
index 24f449d1..8716988d 100644
--- a/CHANGES
+++ b/CHANGES
@@ -154,6 +154,9 @@ Process kills
 - Switched to using killpg() instead of kill -9 in killOrphans(), as suggested by P. McGuigan while
   debugging left processes after looping job kill (processes)
 
+Log message fix
+- Corrected % -> %s in log message in stageIn() (base)
+
 Updates from W. Guan:
 
   https://github.com/PanDAWMS/pilot/pull/221
diff --git a/movers/base.py b/movers/base.py
index 19dc3883..3cc08a74 100644
--- a/movers/base.py
+++ b/movers/base.py
@@ -322,7 +322,7 @@ def stageIn(self, source, destination, fspec):
         src_fsize = fspec.filesize
 
         if not self.shouldVerifyStageIn():
-            self.log("skipped stage-in verification for lfn=%" % fspec.lfn)
+            self.log("skipped stage-in verification for lfn=%s" % fspec.lfn)
             return {'checksum': dst_checksum, 'checksum_type':dst_checksum_type, 'filesize':src_fsize}
 
         src_checksum, src_checksum_type = fspec.get_checksum()