diff --git a/lib/uart1.c b/lib/uart1.c
index 672c795e4..b5bd78011 100644
--- a/lib/uart1.c
+++ b/lib/uart1.c
@@ -65,8 +65,9 @@ void uart1_putc(char c) {
 		u1_head += 1;
 		if (u1_head >= sizeof(u1_tx_buf))
 			u1_head = 0;
-		if (u1_head == u1_tail) /* drop chars when no room */
-			return;
+		if (u1_head == u1_tail) { /* drop chars when no room */
+			if (u1_head) { u1_head -=1; } else { u1_head = sizeof(u1_tx_buf); }
+		}
 		enable_irq(UART1);
 	}
 }