diff --git a/src/alert-unified2-alert.c b/src/alert-unified2-alert.c
index 67e7defbe6..6eb62c29e7 100644
--- a/src/alert-unified2-alert.c
+++ b/src/alert-unified2-alert.c
@@ -373,7 +373,7 @@ int Unified2Logger(ThreadVars *t, void *data, const Packet *p)
 typedef struct _FakeIPv4Hdr {
     IPV4Hdr ip4h;
     TCPHdr tcph;
-} __attribute__((__packed__)) FakeIPv4Hdr;
+} FakeIPv4Hdr;
 
 static int Unified2ForgeFakeIPv4Header(FakeIPv4Hdr *fakehdr, const Packet *p, int pkt_len, char invert)
 {
@@ -403,7 +403,7 @@ static int Unified2ForgeFakeIPv4Header(FakeIPv4Hdr *fakehdr, const Packet *p, in
 typedef struct _FakeIPv6Hdr {
     IPV6Hdr ip6h;
     TCPHdr tcph;
-} __attribute__((__packed__)) FakeIPv6Hdr;
+} FakeIPv6Hdr;
 
 /**
  *  \param payload_len length of the payload