diff --git a/lambda-test/alert-test.c b/lambda-test/alert-test.c
index 5abdbd1..e7b143a 100644
--- a/lambda-test/alert-test.c
+++ b/lambda-test/alert-test.c
@@ -21,7 +21,7 @@
 	beepCount = 0;
 	oscCount = 0;
 
-	// alert with two beep2 with a length of 2 and tone 31
+	// alert with two beeps with a length of 2 and tone 31
 	alert(2, 2, 31, "a", "b");
 	oscillateBeep();
 	oscillateBeep();
diff --git a/lambda-test/interrupts-test.c b/lambda-test/interrupts-test.c
index 13d257b..4dd5e09 100644
--- a/lambda-test/interrupts-test.c
+++ b/lambda-test/interrupts-test.c
@@ -68,7 +68,7 @@
 	assertTrue(bit_is_set(TCCR1B, CS11));
 	// toggles PB1 at 7.8 kHz generating a 3.9 kHz beep
 	// assertTrue(OCR1A == 15);
-	// 1.8 kHz is less noisy on the small piezo beeper
+	// 2 kHz is less noisy on the small piezo beeper
 	assertTrue(OCR1A == 31);
 
 	return true;
diff --git a/lambda/TODO b/lambda/TODO
index c11df0e..54e5991 100644
--- a/lambda/TODO
+++ b/lambda/TODO
@@ -1,9 +1,6 @@
 * C
-- Use static global vars + getter or extern in tests?
-- Use const for "final" function parameters
 - Check other use of const (return value?)
 - Flexarray? http://en.wikipedia.org/wiki/Sizeof
-- License? (github)
 
 * AVR
 - What happens if USART data is sent to the AVR too fast (GtkTerm Send Raw File)
diff --git a/lambda/alert.c b/lambda/alert.c
index f424089..1b7e7f6 100644
--- a/lambda/alert.c
+++ b/lambda/alert.c
@@ -50,7 +50,7 @@
 	beepLength = length;
 }
 
-void alert(uint8_t const beeps, uint8_t const length, uint16_t tone,
+void alert(uint8_t const beeps, uint8_t const length, uint16_t const tone,
 		char* const line0, char* const line1) {
 	OCR1A = tone;
 	if (TCNT1 >= tone) TCNT1 = 0;
diff --git a/lambda/interrupts.c b/lambda/interrupts.c
index 29a4efc..3b2a509 100644
--- a/lambda/interrupts.c
+++ b/lambda/interrupts.c
@@ -53,12 +53,10 @@
 	}
 }
 
-// TODO doesn't really belong in this source file
 bool isUSARTReceived(void) {
 	return usartReceived;
 }
 
-// TODO doesn't really belong in this source file
 void getUSARTData(char* const data, size_t const size) {
 	if (size > 0) {
 	    data[0] = '\0';
@@ -81,7 +79,6 @@
 
 void setupPorts(void) {
 	// pull-up resistor for the mouton
-	// INT0 and INT1 are assigned to the LCD, a bit of a shame
 	PORTB |= (1 << PB0);
 
 	// enable beep output pin
@@ -120,6 +117,6 @@
 	TCCR1B |= (1 << CS11);
 	// toggles PB1 at 7.8 kHz generating a 3.9 kHz beep
 	// OCR1A = 15;
-	// 1.8 kHz is less noisy on the small piezo beeper
+	// 2 kHz is less noisy on the small piezo beeper
 	OCR1A = 31;
 }