diff --git a/lib/galaxy/jobs/dynamic_tool_destination.py b/lib/galaxy/jobs/dynamic_tool_destination.py
index f6486f455cb..d9ccee1c16a 100755
--- a/lib/galaxy/jobs/dynamic_tool_destination.py
+++ b/lib/galaxy/jobs/dynamic_tool_destination.py
@@ -1219,7 +1219,7 @@ def bytes_to_str(size, unit="YB"):
 
     try:
         return_str = "{:.2f} {}".format(size_changer, units[i])
-    except TypeError:
+    except (ValueError, TypeError):
         return_str = "%s" % (size_changer)
 
     return return_str