diff --git a/libs/control.h b/libs/control.h
index f541265..dd89b29 100644
--- a/libs/control.h
+++ b/libs/control.h
@@ -174,7 +174,7 @@ int fpga_swset_is_used(struct fpga_model* model, int y, int x,
 
 // When calling, same_len must contain the size of the
 // same_sw array. Upon return same_len returns how many
-// switches were found and writen to same_sw.
+// switches were found and written to same_sw.
 int fpga_switch_same_fromto(struct fpga_model* model, int y, int x,
 	swidx_t sw, int from_to, swidx_t* same_sw, int *same_len);
 // fpga_switch_lookup() returns NO_SWITCH if switch not found.
diff --git a/mini-jtag/jtag.c b/mini-jtag/jtag.c
index 329b194..bc218b1 100644
--- a/mini-jtag/jtag.c
+++ b/mini-jtag/jtag.c
@@ -18,7 +18,7 @@ int tap_tms(struct ftdi_context *ftdi, int tms, uint8_t bit7)
 {
 	uint8_t buf[3];
 	buf[0] = MPSSE_WRITE_TMS|MPSSE_LSB|MPSSE_BITMODE|MPSSE_WRITE_NEG;
-	buf[1] = 0;		/* value = lenght - 1 */
+	buf[1] = 0;		/* value = length - 1 */
 	buf[2] = (tms ? 0x01 : 0x00) | ((bit7 & 0x01) << 7);
 	if (ftdi_write_data(ftdi, buf, 3) != 3)
 		return -1;