dhcp: fix operator precedence issue with macro

diff --git a/src/libsystemd-network/dhcp-protocol.h b/src/libsystemd-network/dhcp-protocol.h
index 3e32484c1d6d21461090b83154baa8618c914f41..5cf7abbff98e5cd4b724c60580265f931fcd6766 100644 (file)
--- a/src/libsystemd-network/dhcp-protocol.h
+++ b/src/libsystemd-network/dhcp-protocol.h
@@ -59,7 +59,7 @@ typedef struct DHCPPacket DHCPPacket;
 #define DHCP_IP_UDP_SIZE        (int32_t)(sizeof(struct udphdr) + DHCP_IP_SIZE)
 #define DHCP_MESSAGE_SIZE       (int32_t)(sizeof(DHCPMessage))
 #define DHCP_DEFAULT_MIN_SIZE   576 /* the minimum internet hosts must be able to receive */
-#define DHCP_MIN_OPTIONS_SIZE   DHCP_DEFAULT_MIN_SIZE - DHCP_IP_UDP_SIZE - DHCP_MESSAGE_SIZE
+#define DHCP_MIN_OPTIONS_SIZE   (DHCP_DEFAULT_MIN_SIZE - DHCP_IP_UDP_SIZE - DHCP_MESSAGE_SIZE)
 #define DHCP_MAGIC_COOKIE       (uint32_t)(0x63825363)
 
 enum {