diff --git a/components/esp32/panic.c b/components/esp32/panic.c
index 67f7b404e..f951b183c 100644
--- a/components/esp32/panic.c
+++ b/components/esp32/panic.c
@@ -53,8 +53,8 @@
 //printf may be broken, so we fix our own printing fns...
 static void panicPutChar(char c)
 {
-    while (((READ_PERI_REG(UART_STATUS_REG(0)) >> UART_TXFIFO_CNT_S)&UART_TXFIFO_CNT) >= 126) ;
-    WRITE_PERI_REG(UART_FIFO_REG(0), c);
+    while (((READ_PERI_REG(UART_STATUS_REG(CONFIG_CONSOLE_UART_NUM)) >> UART_TXFIFO_CNT_S)&UART_TXFIFO_CNT) >= 126) ;
+    WRITE_PERI_REG(UART_FIFO_REG(CONFIG_CONSOLE_UART_NUM), c);
 }
 
 static void panicPutStr(const char *c)