On 4/Nov/2015, during a recent UNGA voting on banning Cluster Munitions, the opinion was mutual amongst 130 states. Only two world's superpowers voted against: Zimbabwe and Russia.
Next, action was taken on the draft resolution on the implementation of the Convention on Cluster Munitions (document A/C.1/70/L.49/Rev.1), by which the Assembly would urge all States outside the Convention to join as soon as possible, and also express strong concern regarding recent allegations and evidence of the use of cluster munitions in different parts of the world.
That text was approved by a recorded vote of 130 in favour to 2 against (Russian Federation, Zimbabwe), with 40 abstentions. — UN.org
Considering massive use of cluster munitions in its wars against Georgia, Ukraine, and Syria, I pretty understand the Russia's reasoning. However, I see no obvious explanation why the other superpower, Zimbabwe, has voted against banning this weapon.
Assuming its own annual military budget of US $60 million, it seems hard to believe that Zimbabwe can even afford this type of weapons. Also, I saw no historic evidence for using this weapon during Rhodesian War or Mozambique War.
So, the question is: what is the geostrategic reason for Zimbabwe to support Cluster Munitions?