Genesis 5:2

"He created them male and female and blessed them.  And when they were created, he called them "man."  Genesis 5:2

This verse clarifies that it's not just the men of our species that our created in God's image.  Here it is reaffirming that these places where the word "man" has been used is referring to mankind, both the men and women.  So it's not just men that are created in God's image, women are too.