diff --git a/src/core/wee-command.c b/src/core/wee-command.c
index b90bbd1fb..66be06f4d 100644
--- a/src/core/wee-command.c
+++ b/src/core/wee-command.c
@@ -1520,6 +1520,7 @@ COMMAND_CALLBACK(eval)
                 hashtable_set (options, "type", "condition");
         }
 
+        result = NULL;
         if (print_only)
         {
             expr = string_remove_quotes (ptr_args, "\"");