diff --git a/dda_queue.c b/dda_queue.c
index ae184f5..2f80a47 100644
--- a/dda_queue.c
+++ b/dda_queue.c
@@ -41,9 +41,9 @@ DDA BSS movebuffer[MOVEBUFFER_SIZE];
 uint8_t queue_full() {
 	MEMORY_BARRIER();
 	if (mb_tail > mb_head) {
-		return ((mb_tail - mb_head - 1) == 0) ? 255 : 0;
+    return (mb_tail - mb_head - 1 == 0);
 	} else {
-		return ((mb_tail + MOVEBUFFER_SIZE - mb_head - 1) == 0) ? 255 : 0;
+    return (mb_tail + MOVEBUFFER_SIZE - mb_head - 1 == 0);
 	}
 }
 
@@ -52,7 +52,7 @@ uint8_t queue_empty() {
   uint8_t result;
 
   ATOMIC_START
-    result = ((mb_tail == mb_head) && (movebuffer[mb_tail].live == 0))?255:0;
+    result = (mb_tail == mb_head && movebuffer[mb_tail].live == 0);
   ATOMIC_END
 
 	return result;
@@ -154,7 +154,7 @@ void enqueue_home(TARGET *t, uint8_t endstop_check, uint8_t endstop_stop_cond) {
 /// be interrupted such that it can be re-entered from within an interrupt.
 /// The timer interrupt MUST be disabled on entry. This is ensured because
 /// the timer was disabled at the start of the ISR or else because the current
-/// move buffer was dead in the non-interrupt case (which indicates that the 
+/// move buffer was dead in the non-interrupt case (which indicates that the
 /// timer interrupt is disabled).
 void next_move() {
 	while ((queue_empty() == 0) && (movebuffer[mb_tail].live == 0)) {
@@ -164,7 +164,7 @@ void next_move() {
 		DDA* current_movebuffer = &movebuffer[t];
     // Tail must be set before calling timer_set(), as timer_set() reenables
     // the timer interrupt, potentially exposing mb_tail to the timer
-    // interrupt routine. 
+    // interrupt routine.
 		mb_tail = t;
 		if (current_movebuffer->waitfor_temp) {
 			serial_writestr_P(PSTR("Waiting for target temp\n"));
@@ -174,7 +174,7 @@ void next_move() {
 		else {
 			dda_start(current_movebuffer);
 		}
-	} 
+	}
 }
 
 /// DEBUG - print queue.