The West Indies' seven-match winning streak in Twenty20 internationals was brought to a dramatic end by Pakistan in Amos Vale on Saturday.
With the scores level, debutant Zulfiqar Babar smashed Marlon Samuels for six off the final ball to clinch a two-wicket victory for Pakistan.
Babar, who finished on 13 not out, had earlier impressed with bowling figures of 3-23 to help his side restrict the Windes to 152-7.
The final match of the two-game series will take place tonight at 7pm (UK time).