diff --git a/components/esp_eth/src/w5500.h b/components/esp_eth/src/w5500.h
index 4820c4c85435..c704ca8e077a 100644
--- a/components/esp_eth/src/w5500.h
+++ b/components/esp_eth/src/w5500.h
@@ -16,7 +16,7 @@
 #define W5500_BSB_OFFSET  (3)  // Block Select Bits offset
 #define W5500_RWB_OFFSET  (2)  // Read Write Bits offset
 
-#define W5500_CHIP_VERSION 0x4 // Chip version that VERSIONR returns
+#define W5500_CHIP_VERSION (0x4) // Chip version that VERSIONR returns
 
 #define W5500_BSB_COM_REG        (0x00)    // Common Register
 #define W5500_BSB_SOCK_REG(s)    ((s)*4+1) // Socket Register