diff --git a/src/glb-director/glb_director_config.h b/src/glb-director/glb_director_config.h
index 2053d7d..57fda3e 100644
--- a/src/glb-director/glb_director_config.h
+++ b/src/glb-director/glb_director_config.h
@@ -30,8 +30,8 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef _GLB_DIRECTOR_CONFIG_H
-#define _GLB_DIRECTOR_CONFIG_H
+#ifndef GLB_DIRECTOR_CONFIG_H
+#define GLB_DIRECTOR_CONFIG_H
 #include <rte_ether.h>
 
 #define MAX_FLOW_PATHS 32
diff --git a/src/glb-hashing/packet_parsing.h b/src/glb-hashing/packet_parsing.h
index c0264e3..e606a63 100644
--- a/src/glb-hashing/packet_parsing.h
+++ b/src/glb-hashing/packet_parsing.h
@@ -30,8 +30,8 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef _PACKET_PARSING_H_
-#define _PACKET_PARSING_H_
+#ifndef PACKET_PARSING_H
+#define PACKET_PARSING_H
 
 #include <stdint.h>
 
@@ -461,4 +461,4 @@ static __always_inline uint64_t glb_compute_hash(glb_route_context *route_contex
     return pkt_hash;
 }
 
-#endif /* _PACKET_PARSING_H_ */
+#endif /* PACKET_PARSING_H */
diff --git a/src/glb-hashing/pdnet.h b/src/glb-hashing/pdnet.h
index 8001553..e7ee9e3 100644
--- a/src/glb-hashing/pdnet.h
+++ b/src/glb-hashing/pdnet.h
@@ -12,8 +12,8 @@
    <http://creativecommons.org/publicdomain/zero/1.0/>.
  */
 
-#ifndef _PDNET_H_
-#define _PDNET_H_
+#ifndef PDNET_H
+#define PDNET_H
 
 #include <stdint.h>
 #include <endian.h>
@@ -206,4 +206,4 @@ struct pdnet_icmpv6_too_big_hdr {
 #define PDNET_IP_PROTO_UDP    0x11
 #define PDNET_IP_PROTO_ICMPV6 0x3A
 
-#endif /* _PDNET_H_ */
+#endif /* PDNET_H */
diff --git a/src/glb-redirect/ipt_glbredirect.h b/src/glb-redirect/ipt_glbredirect.h
index 57e25ba..4bf4ecf 100644
--- a/src/glb-redirect/ipt_glbredirect.h
+++ b/src/glb-redirect/ipt_glbredirect.h
@@ -19,8 +19,8 @@
  * along with glb-redirect.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-#ifndef __IPT_GLBREDIRECT_MATCH__
-#define __IPT_GLBREDIRECT_MATCH__
+#ifndef IPT_GLBREDIRECT_MATCH
+#define IPT_GLBREDIRECT_MATCH
 
 struct ipt_glbredirect_info {