diff --git a/arch/arm/src/sam34/sam4s_nand.c b/arch/arm/src/sam34/sam4s_nand.c
index abe9c6000f..953a799457 100644
--- a/arch/arm/src/sam34/sam4s_nand.c
+++ b/arch/arm/src/sam34/sam4s_nand.c
@@ -149,7 +149,10 @@ static int nand_wait_ready(struct sam_nandcs_s *priv)
 
   /* The ready/busy (R/nB) signal of the NAND Flash  */
 
-  while (!sam_gpioread(priv->rb));
+  while (!sam_gpioread(priv->rb))
+    {
+    }
+
   WRITE_COMMAND8(&priv->raw, COMMAND_STATUS);
 
   /* Issue command */