diff --git a/include/libopencm3/stm32/l1/rcc.h b/include/libopencm3/stm32/l1/rcc.h
index b688a34f..cf8a7197 100644
--- a/include/libopencm3/stm32/l1/rcc.h
+++ b/include/libopencm3/stm32/l1/rcc.h
@@ -430,7 +430,7 @@
 #define RCC_CSR_RTCSEL_NONE			(0x0)
 #define RCC_CSR_RTCSEL_LSE			(0x1)
 #define RCC_CSR_RTCSEL_LSI			(0x2)
-#define RCC_CSR_RTCSEL_HSI			(0x3)
+#define RCC_CSR_RTCSEL_HSE			(0x3)
 #define RCC_CSR_LSECSSD				(1 << 12)
 #define RCC_CSR_LSECSSON			(1 << 11)
 #define RCC_CSR_LSEBYP				(1 << 10)
diff --git a/lib/stm32/l1/lcd.c b/lib/stm32/l1/lcd.c
index 68173ab8..b013735d 100644
--- a/lib/stm32/l1/lcd.c
+++ b/lib/stm32/l1/lcd.c
@@ -131,9 +131,9 @@ void lcd_set_refresh_frequency(uint32_t frequency)
 	case RCC_CSR_RTCSEL_LSI:
 		lcd_clock = 37000;
 		break;
-	case RCC_CSR_RTCSEL_HSI:
-		lcd_clock = 16000000;
-		break;
+	case RCC_CSR_RTCSEL_HSE:
+		/* no current method of determining clock and divider! */
+		return;
 	default:
 		/* RCC Clock not selected */
 		return;