diff --git a/arch/arm/src/sam34/sam_lowputc.c b/arch/arm/src/sam34/sam_lowputc.c
index dbacb110dd..9c7636c416 100644
--- a/arch/arm/src/sam34/sam_lowputc.c
+++ b/arch/arm/src/sam34/sam_lowputc.c
@@ -299,6 +299,8 @@ void up_lowputc(char ch)
           /* Send the character */
 
           putreg32((uint32_t)ch, SAM_CONSOLE_BASE + SAM_UART_THR_OFFSET);
+          irqrestore(flags);
+          return;
         }
 
       irqrestore(flags);