Any of the Matres Lectionis (alef, heh, vav, or yod) may have a dot inside of them (which looks identical to a dagesh). This is called a Mappiq, and means that the consonant should be fully pronounced.

For a vav, this is quite rare and may seem confusing as it will appear as what would normally be a shuruq, but the presence of a following vowel will be the clue that it is actually a mappiq.