diff --git a/gtests/net/packetdrill/packet.h b/gtests/net/packetdrill/packet.h
index 75a922106425fc812e6621d9feebcb3cdd9be200..a51c9e1162421ed59f972a2bec91e86fdda3045c 100644
--- a/gtests/net/packetdrill/packet.h
+++ b/gtests/net/packetdrill/packet.h
@@ -106,8 +106,8 @@ struct packet {
 	s64 time_usecs;		/* wall time of receive/send if non-zero */
 
 	u32 flags;		  /* various meta-flags */
-#define FLAG_WIN_NOCHECK	  0x1  /* don't check TCP receive window */
-#define FLAG_OPTIONS_NOCHECK	  0x2  /* don't check TCP options */
+#define FLAG_WIN_NOCHECK          0x1  /* don't check TCP receive window */
+#define FLAG_OPTIONS_NOCHECK      0x2  /* don't check TCP options */
 #define FLAGS_SCTP_BAD_CRC32C     0x4  /* compute bad CRC32C for SCTP packets */
 #define FLAGS_SCTP_EXPLICIT_TAG   0x8  /* verification tag specified */
 #define FLAGS_SCTP_GENERIC_PACKET 0x10 /* set if it is a generic packet */