diff --git a/src/serial_posix.c b/src/serial_posix.c
index c33882a..1d09621 100644
--- a/src/serial_posix.c
+++ b/src/serial_posix.c
@@ -353,7 +353,11 @@ dc_serial_configure (dc_serial_t *device, unsigned int baudrate, unsigned int da
 	}
 
 	// Set the parity type.
+#ifdef CMSPAR
+	tty.c_cflag &= ~(PARENB | PARODD | CMSPAR);
+#else
 	tty.c_cflag &= ~(PARENB | PARODD);
+#endif
 	tty.c_iflag &= ~(IGNPAR | PARMRK | INPCK);
 	switch (parity) {
 	case DC_PARITY_NONE:
@@ -367,6 +371,16 @@ dc_serial_configure (dc_serial_t *device, unsigned int baudrate, unsigned int da
 		tty.c_cflag |= (PARENB | PARODD);
 		tty.c_iflag |= INPCK;
 		break;
+#ifdef CMSPAR
+	case DC_PARITY_MARK:
+		tty.c_cflag |= (PARENB | PARODD | CMSPAR);
+		tty.c_iflag |= INPCK;
+		break;
+	case DC_PARITY_SPACE:
+		tty.c_cflag |= (PARENB | CMSPAR);
+		tty.c_iflag |= INPCK;
+		break;
+#endif
 	default:
 		return DC_STATUS_INVALIDARGS;
 	}
diff --git a/src/serial_win32.c b/src/serial_win32.c
index a7dd039..ce8515b 100644
--- a/src/serial_win32.c
+++ b/src/serial_win32.c
@@ -244,6 +244,14 @@ dc_serial_configure (dc_serial_t *device, unsigned int baudrate, unsigned int da
 		dcb.Parity = ODDPARITY;
 		dcb.fParity = TRUE;
 		break;
+	case DC_PARITY_MARK:
+		dcb.Parity = MARKPARITY;
+		dcb.fParity = TRUE;
+		break;
+	case DC_PARITY_SPACE:
+		dcb.Parity = SPACEPARITY;
+		dcb.fParity = TRUE;
+		break;
 	default:
 		return DC_STATUS_INVALIDARGS;
 	}