diff --git a/scripts/lib/wic/plugins/source/rawcopy.py b/scripts/lib/wic/plugins/source/rawcopy.py
index 6bdd9b21ce..ca6b721b67 100644
--- a/scripts/lib/wic/plugins/source/rawcopy.py
+++ b/scripts/lib/wic/plugins/source/rawcopy.py
@@ -76,7 +76,7 @@ class RawCopyPlugin(SourcePlugin):
         out = exec_cmd(du_cmd)
         filesize = out.split()[0]
 
-        if filesize > part.size:
+        if int(filesize) > int(part.size):
             part.size = filesize
 
         part.source_file = dst