diff --git a/tools/releasetools/build_image.py b/tools/releasetools/build_image.py
index 3e159a6..10d9561 100755
--- a/tools/releasetools/build_image.py
+++ b/tools/releasetools/build_image.py
@@ -197,8 +197,11 @@
 
   cmd.extend(shlex.split(additional_args))
 
-  (_, exit_code) = RunCommand(cmd)
-  return exit_code == 0
+  output, exit_code = RunCommand(cmd)
+  if exit_code != 0:
+    print("Failed to add AVB footer! Error: %s" % output)
+    return False
+  return True
 
 
 def AdjustPartitionSizeForVerity(partition_size, fec_supported):
@@ -587,7 +590,8 @@
     additional_args = prop_dict["avb_add_" + avb_footer_type + "_footer_args"]
     max_image_size = AVBCalcMaxImageSize(avbtool, avb_footer_type,
                                          partition_size, additional_args)
-    if max_image_size == 0:
+    if max_image_size <= 0:
+      print("AVBCalcMaxImageSize is <= 0: %d" % max_image_size)
       return False
     prop_dict["partition_size"] = str(max_image_size)
     prop_dict["original_partition_size"] = partition_size