IPFW committed six turnovers in the last 5 1/2 minutes and trail North Dakota State 26-25 at halftime Saturday at the Gates Center.
The Mastodons came out hot from behind the three-point line, hitting five to take a 20-13 lead, but then came the turnover-fest.
Luis Jacobo leads the Mastodons with seven points, and Isaiah McCray has six.
Two players have combined for 23 of North Dakota State's 26. Guard Lawrence Alexander has 13, and center Marshall Bjorklund has 10.