diff --git a/src/decode-icmpv4.h b/src/decode-icmpv4.h
index 87bcd9bd75..1f4f486298 100644
--- a/src/decode-icmpv4.h
+++ b/src/decode-icmpv4.h
@@ -166,7 +166,7 @@ typedef struct ICMPV4Hdr_
     uint8_t  type;
     uint8_t  code;
     uint16_t checksum;
-} __attribute__((__packed__)) ICMPV4Hdr;
+} ICMPV4Hdr;
 
 /* ICMPv4 header structure */
 typedef struct ICMPV4ExtHdr_