diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index c708154..97cfee9 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -2937,7 +2937,7 @@
           th.join()
 
       if p.returncode != 0:
-        logger.warning("Failure running %s:\n%s\n", diff_program, "".join(err))
+        logger.warning("Failure running %s:\n%s\n", cmd, "".join(err))
         self.patch = None
         return None, None, None
       diff = ptemp.read()