diff --git a/cddl/lib/libdtrace/tcp.d b/cddl/lib/libdtrace/tcp.d
index ea3a553ebf5..4e1061e6c7c 100644
--- a/cddl/lib/libdtrace/tcp.d
+++ b/cddl/lib/libdtrace/tcp.d
@@ -263,7 +263,7 @@ translator tcpinfo_t < struct tcphdr *p > {
 	tcp_dport =	p == NULL ? 0  : ntohs(p->th_dport);
 	tcp_seq =	p == NULL ? -1 : ntohl(p->th_seq);
 	tcp_ack =	p == NULL ? -1 : ntohl(p->th_ack);
-	tcp_offset =	p == NULL ? -1 : (p->th_off >> 2);
+	tcp_offset =	p == NULL ? -1 : (p->th_off << 2);
 	tcp_flags =	p == NULL ? 0  : p->th_flags;
 	tcp_window =	p == NULL ? 0  : ntohs(p->th_win);
 	tcp_checksum =	p == NULL ? 0  : ntohs(p->th_sum);
@@ -282,7 +282,7 @@ translator tcpinfoh_t < struct tcphdr *p > {
 	tcp_dport =	p == NULL ? 0  : ntohs(p->th_dport);
 	tcp_seq =	p == NULL ? -1 : p->th_seq;
 	tcp_ack =	p == NULL ? -1 : p->th_ack;
-	tcp_offset =	p == NULL ? -1 : (p->th_off >> 2);
+	tcp_offset =	p == NULL ? -1 : (p->th_off << 2);
 	tcp_flags =	p == NULL ? 0  : p->th_flags;
 	tcp_window =	p == NULL ? 0  : p->th_win;
 	tcp_checksum =	p == NULL ? 0  : ntohs(p->th_sum);