diff --git a/cpu/lpc1768/periph/gpio.c b/cpu/lpc1768/periph/gpio.c
index c876f9050b..3ac26d15c6 100644
--- a/cpu/lpc1768/periph/gpio.c
+++ b/cpu/lpc1768/periph/gpio.c
@@ -231,7 +231,7 @@ void isr_eint3(void)
 
     /* invoke all handlers */
     for (int i = 0; i < NUMOF_IRQS; i++) {
-        if (status & (1 << i)) {
+        if (status & ((uint32_t)1 << i)) {
             isr_ctx[i].cb(isr_ctx[i].arg);
 
             LPC_GPIOINT->IO0IntClr |= (1 << i);