diff --git a/tools/spi-hdlc-adapter/spi-hdlc-adapter.c b/tools/spi-hdlc-adapter/spi-hdlc-adapter.c
index ea37d275c..5cb24300d 100644
--- a/tools/spi-hdlc-adapter/spi-hdlc-adapter.c
+++ b/tools/spi-hdlc-adapter/spi-hdlc-adapter.c
@@ -92,6 +92,7 @@
 
 #define MAX_FRAME_SIZE 2048
 #define HEADER_LEN 5
+#define HDLC_MAX_FRAME_SIZE ((MAX_FRAME_SIZE - HEADER_LEN) * 2 + 5)
 #define SPI_HEADER_RESET_FLAG 0x80
 #define SPI_HEADER_CRC_FLAG 0x40
 #define SPI_HEADER_PATTERN_VALUE 0x02
@@ -803,7 +804,7 @@ static int push_hdlc(void)
 {
     int             ret              = 0;
     const uint8_t  *spiRxFrameBuffer = get_real_rx_frame_start();
-    static uint8_t  escaped_frame_buffer[MAX_FRAME_SIZE * 2];
+    static uint8_t  escaped_frame_buffer[HDLC_MAX_FRAME_SIZE];
     static uint16_t unescaped_frame_len;
     static uint16_t escaped_frame_len;
     static uint16_t escaped_frame_sent;