diff --git a/ros/src/util/packages/runtime_manager/scripts/runtime_manager_dialog.py b/ros/src/util/packages/runtime_manager/scripts/runtime_manager_dialog.py
index 6775b1d70cf..a7bf8948141 100755
--- a/ros/src/util/packages/runtime_manager/scripts/runtime_manager_dialog.py
+++ b/ros/src/util/packages/runtime_manager/scripts/runtime_manager_dialog.py
@@ -2988,7 +2988,7 @@ def size_arg_get(self):
 			mb = 0
 		if mb <= 0:
 			tc.SetValue('')
-		return [ '--size=' + str(int(mb * 1024 * 1024)) ] if mb > 0 else []
+		return [ '--size=' + str(int(mb)) ] if mb > 0 else []
 
 def set_size_gdic(dlg, gdic={}):
 	(w, h) = dlg.GetSize()