diff --git a/include/odp/api/packet_flags.h b/include/odp/api/packet_flags.h
index b1e179e..bfbcc94 100644
--- a/include/odp/api/packet_flags.h
+++ b/include/odp/api/packet_flags.h
@@ -32,7 +32,7 @@ extern "C" {
  * Checks all error flags at once.
  *
  * @param pkt Packet handle
- * @retval 1 packet has errors
+ * @retval non-zero packet has errors
  * @retval 0 packet has no errors
  */
 int odp_packet_has_error(odp_packet_t pkt);
@@ -41,7 +41,7 @@ int odp_packet_has_error(odp_packet_t pkt);
  * Check for L2 header, e.g. ethernet
  *
  * @param pkt Packet handle
- * @retval 1 if packet contains a valid & known L2 header
+ * @retval non-zero if packet contains a valid & known L2 header
  * @retval 0 if packet does not contain a valid & known L2 header
  */
 int odp_packet_has_l2(odp_packet_t pkt);
@@ -50,7 +50,7 @@ int odp_packet_has_l2(odp_packet_t pkt);
  * Check for L3 header, e.g. IPv4, IPv6
  *
  * @param pkt Packet handle
- * @retval 1 if packet contains a valid & known L3 header
+ * @retval non-zero if packet contains a valid & known L3 header
  * @retval 0 if packet does not contain a valid & known L3 header
  */
 int odp_packet_has_l3(odp_packet_t pkt);
@@ -59,7 +59,7 @@ int odp_packet_has_l3(odp_packet_t pkt);
  * Check for L4 header, e.g. UDP, TCP, SCTP (also ICMP)
  *
  * @param pkt Packet handle
- * @retval 1 if packet contains a valid & known L4 header
+ * @retval non-zero if packet contains a valid & known L4 header
  * @retval 0 if packet does not contain a valid & known L4 header
  */
 int odp_packet_has_l4(odp_packet_t pkt);
@@ -68,7 +68,7 @@ int odp_packet_has_l4(odp_packet_t pkt);
  * Check for Ethernet header
  *
  * @param pkt Packet handle
- * @retval 1 if packet contains a valid eth header
+ * @retval non-zero if packet contains a valid eth header
  * @retval 0 if packet does not contain a valid & known eth header
  */
 int odp_packet_has_eth(odp_packet_t pkt);
@@ -77,7 +77,7 @@ int odp_packet_has_eth(odp_packet_t pkt);
  * Check for jumbo frame
  *
  * @param pkt Packet handle
- * @retval 1 if packet contains a jumbo frame
+ * @retval non-zero if packet contains a jumbo frame
  * @retval 0 if packet does not contain a jumbo frame
  */
 int odp_packet_has_jumbo(odp_packet_t pkt);
@@ -86,7 +86,7 @@ int odp_packet_has_jumbo(odp_packet_t pkt);
  * Check for VLAN
  *
  * @param pkt Packet handle
- * @retval 1 if packet contains a VLAN header
+ * @retval non-zero if packet contains a VLAN header
  * @retval 0 if packet does not contain a VLAN header
  */
 int odp_packet_has_vlan(odp_packet_t pkt);
@@ -95,7 +95,7 @@ int odp_packet_has_vlan(odp_packet_t pkt);
  * Check for VLAN QinQ (stacked VLAN)
  *
  * @param pkt Packet handle
- * @retval 1 if packet contains a VLAN QinQ header
+ * @retval non-zero if packet contains a VLAN QinQ header
  * @retval 0 if packet does not contain a VLAN QinQ header
  */
 int odp_packet_has_vlan_qinq(odp_packet_t pkt);
@@ -104,7 +104,7 @@ int odp_packet_has_vlan_qinq(odp_packet_t pkt);
  * Check for ARP
  *
  * @param pkt Packet handle
- * @retval 1 if packet contains an ARP message
+ * @retval non-zero if packet contains an ARP message
  * @retval 0 if packet does not contain an ARP message
  */
 int odp_packet_has_arp(odp_packet_t pkt);
@@ -113,7 +113,7 @@ int odp_packet_has_arp(odp_packet_t pkt);
  * Check for IPv4
  *
  * @param pkt Packet handle
- * @retval 1 if packet contains an IPv4 header
+ * @retval non-zero if packet contains an IPv4 header
  * @retval 0 if packet does not contain an IPv4 header
  */
 int odp_packet_has_ipv4(odp_packet_t pkt);
@@ -122,7 +122,7 @@ int odp_packet_has_ipv4(odp_packet_t pkt);
  * Check for IPv6
  *
  * @param pkt Packet handle
- * @retval 1 if packet contains an IPv6 header
+ * @retval non-zero if packet contains an IPv6 header
  * @retval 0 if packet does not contain an IPv6 header
  */
 int odp_packet_has_ipv6(odp_packet_t pkt);
@@ -131,7 +131,7 @@ int odp_packet_has_ipv6(odp_packet_t pkt);
  * Check for IP fragment
  *
  * @param pkt Packet handle
- * @retval 1 if packet is an IP fragment
+ * @retval non-zero if packet is an IP fragment
  * @retval 0 if packet is not an IP fragment
  */
 int odp_packet_has_ipfrag(odp_packet_t pkt);
@@ -140,7 +140,7 @@ int odp_packet_has_ipfrag(odp_packet_t pkt);
  * Check for IP options
  *
  * @param pkt Packet handle
- * @retval 1 if packet contains IP options
+ * @retval non-zero if packet contains IP options
  * @retval 0 if packet does not contain IP options
  */
 int odp_packet_has_ipopt(odp_packet_t pkt);
@@ -149,7 +149,7 @@ int odp_packet_has_ipopt(odp_packet_t pkt);
  * Check for IPSec
  *
  * @param pkt Packet handle
- * @retval 1 if packet requires IPSec processing
+ * @retval non-zero if packet requires IPSec processing
  * @retval 0 if packet does not require IPSec processing
  */
 int odp_packet_has_ipsec(odp_packet_t pkt);
@@ -158,7 +158,7 @@ int odp_packet_has_ipsec(odp_packet_t pkt);
  * Check for UDP
  *
  * @param pkt Packet handle
- * @retval 1 if packet contains a UDP header
+ * @retval non-zero if packet contains a UDP header
  * @retval 0 if packet does not contain a UDP header
  */
 int odp_packet_has_udp(odp_packet_t pkt);
@@ -167,7 +167,7 @@ int odp_packet_has_udp(odp_packet_t pkt);
  * Check for TCP
  *
  * @param pkt Packet handle
- * @retval 1 if packet contains a TCP header
+ * @retval non-zero if packet contains a TCP header
  * @retval 0 if packet does not contain a TCP header
  */
 int odp_packet_has_tcp(odp_packet_t pkt);
@@ -176,7 +176,7 @@ int odp_packet_has_tcp(odp_packet_t pkt);
  * Check for SCTP
  *
  * @param pkt Packet handle
- * @retval 1 if packet contains a SCTP header
+ * @retval non-zero if packet contains a SCTP header
  * @retval 0 if packet does not contain a SCTP header
  */
 int odp_packet_has_sctp(odp_packet_t pkt);
@@ -185,7 +185,7 @@ int odp_packet_has_sctp(odp_packet_t pkt);
  * Check for ICMP
  *
  * @param pkt Packet handle
- * @retval 1 if packet contains an ICMP header
+ * @retval non-zero if packet contains an ICMP header
  * @retval 0 if packet does not contain an ICMP header
  */
 int odp_packet_has_icmp(odp_packet_t pkt);
