diff --git a/src/arch/msp430fr5969lp/driver/i2c.cc b/src/arch/msp430fr5969lp/driver/i2c.cc
index 80f33b01511f8aba3782882c89ffc528c5a7c870..5f1f4c12722b3b41f16690f340f40e69aaefbeed 100644
--- a/src/arch/msp430fr5969lp/driver/i2c.cc
+++ b/src/arch/msp430fr5969lp/driver/i2c.cc
@@ -57,6 +57,7 @@ signed char I2C::xmit(unsigned char address,
 			UCB0TXBUF = tx_buf[i];
 		}
 		while (!(UCB0IFG & (UCTXIFG0 | UCNACKIFG | UCCLTOIFG)));
+		UCB0IFG &= ~(UCTXIFG0 | UCNACKIFG);
 		//if (UCB0IFG & (UCNACKIFG | UCCLTOIFG)) {
 		//	UCB0IFG &= ~UCNACKIFG;
 		//	UCB0IFG &= ~UCCLTOIFG;