diff --git a/server/drivers/hd44780-serial.c b/server/drivers/hd44780-serial.c
index ccfe3a5..448b11d 100644
--- a/server/drivers/hd44780-serial.c
+++ b/server/drivers/hd44780-serial.c
@@ -68,18 +68,40 @@ unsigned int bitrate_conversion[][2] = {
 	{ 57600, B57600 },
 	{ 115200, B115200 },
 	{ 230400, B230400 },
-	{ 460800, B460800 },
-	{ 500000, B500000 },
-	{ 576000, B576000 },
-	{ 921600, B921600 },
-	{ 1000000, B1000000 },
-	{ 1152000, B1152000 },
-	{ 1500000, B1500000 },
-	{ 2000000, B2000000 },
-	{ 2500000, B2500000 },
-	{ 3000000, B3000000 },
-	{ 3500000, B3500000 },
-	{ 4000000, B4000000 }
+	{ 460800, B460800 }
+#if defined(B500000)
+	, { 500000, B500000 }
+#endif
+#if defined(B576000)
+	, { 576000, B576000 }
+#endif
+#if defined(B921600)
+	, { 921600, B921600 }
+#endif
+#if defined(B1000000)
+	, { 1000000, B1000000 }
+#endif
+#if defined(B1152000)
+	, { 1152000, B1152000 }
+#endif
+#if defined(B1500000)
+	, { 1500000, B1500000 }
+#endif
+#if defined(B2000000)
+	, { 2000000, B2000000 }
+#endif
+#if defined(B2500000)
+	, { 2500000, B2500000 }
+#endif
+#if defined(B3000000)
+	, { 3000000, B3000000 }
+#endif
+#if defined(B3500000)
+	, { 3500000, B3500000 }
+#endif
+#if defined(B4000000)
+	, { 4000000, B4000000 }
+#endif
 };
 
 int convert_bitrate(unsigned int conf_bitrate, size_t *bitrate) {