diff --git a/libmctp-astlpc.h b/libmctp-astlpc.h
index ddc5395..4d90894 100644
--- a/libmctp-astlpc.h
+++ b/libmctp-astlpc.h
@@ -28,7 +28,7 @@
 	int (*lpc_write)(void *data, const void *buf, long offset, size_t len);
 };
 
-#define MCTP_BINDING_ASTLPC_MODE_BMC 0
+#define MCTP_BINDING_ASTLPC_MODE_BMC  0
 #define MCTP_BINDING_ASTLPC_MODE_HOST 1
 struct mctp_binding_astlpc *
 mctp_astlpc_init(uint8_t mode, uint32_t mtu, void *lpc_map,