diff --git a/payloads/libpayload/drivers/keyboard.c b/payloads/libpayload/drivers/keyboard.c
index 970dec9..96285d0 100644
--- a/payloads/libpayload/drivers/keyboard.c
+++ b/payloads/libpayload/drivers/keyboard.c
@@ -79,7 +79,7 @@
 
 int keyboard_getchar(void)
 {
-	static int modifier;
+	static int modifier = 0;
 	unsigned char ch;
 	int shift;
 	int ret = 0;
@@ -91,17 +91,17 @@
 	switch (ch) {
 	case 0x36:
 	case 0x2a:
-		modifier &= ~MOD_SHIFT;
+		modifier |= MOD_SHIFT;
 		break;
 	case 0x80 | 0x36:
 	case 0x80 | 0x2a:
-		modifier |= MOD_SHIFT;
+		modifier &= ~MOD_SHIFT;
 		break;
 	case 0x1d:
-		modifier &= ~MOD_CTRL;
+		modifier |= MOD_CTRL;
 		break;
 	case 0x80 | 0x1d:
-		modifier |= MOD_CTRL;
+		modifier &= ~MOD_CTRL;
 		break;
 	case 0x3a:
 		if (modifier & MOD_CAPSLOCK)