diff --git a/src/core/net/icmp6.hpp b/src/core/net/icmp6.hpp
index 84b3d67c1..6d6441589 100644
--- a/src/core/net/icmp6.hpp
+++ b/src/core/net/icmp6.hpp
@@ -358,4 +358,4 @@ private:
 } // namespace Ip6
 } // namespace ot
 
-#endif // NET_ICMP6_HPP_
+#endif // ICMP6_HPP_
diff --git a/src/core/net/ip6.hpp b/src/core/net/ip6.hpp
index ce9b44c4f..f28b2c3db 100644
--- a/src/core/net/ip6.hpp
+++ b/src/core/net/ip6.hpp
@@ -470,4 +470,4 @@ private:
 } // namespace Ip6
 } // namespace ot
 
-#endif // NET_IP6_HPP_
+#endif // IP6_HPP_
diff --git a/src/core/net/ip6_address.hpp b/src/core/net/ip6_address.hpp
index 34a069bf1..8389a47c7 100644
--- a/src/core/net/ip6_address.hpp
+++ b/src/core/net/ip6_address.hpp
@@ -413,4 +413,4 @@ private:
 } // namespace Ip6
 } // namespace ot
 
-#endif // NET_IP6_ADDRESS_HPP_
+#endif // IP6_ADDRESS_HPP_
diff --git a/src/core/net/ip6_headers.hpp b/src/core/net/ip6_headers.hpp
index 34b37afb7..293c7f5cb 100644
--- a/src/core/net/ip6_headers.hpp
+++ b/src/core/net/ip6_headers.hpp
@@ -632,4 +632,4 @@ private:
 } // namespace Ip6
 } // namespace ot
 
-#endif // NET_IP6_HEADERS_HPP_
+#endif // IP6_HEADERS_HPP_
diff --git a/src/core/net/ip6_mpl.hpp b/src/core/net/ip6_mpl.hpp
index e578436b0..e4dd4f537 100644
--- a/src/core/net/ip6_mpl.hpp
+++ b/src/core/net/ip6_mpl.hpp
@@ -555,4 +555,4 @@ private:
 } // namespace Ip6
 } // namespace ot
 
-#endif // NET_IP6_MPL_HPP_
+#endif // IP6_MPL_HPP_
diff --git a/src/core/net/ip6_routes.hpp b/src/core/net/ip6_routes.hpp
index 59470123c..91c4c4d22 100644
--- a/src/core/net/ip6_routes.hpp
+++ b/src/core/net/ip6_routes.hpp
@@ -122,4 +122,4 @@ private:
 } // namespace Ip6
 } // namespace ot
 
-#endif // NET_IP6_ROUTES_HPP_
+#endif // IP6_ROUTES_HPP_
diff --git a/src/core/net/udp6.hpp b/src/core/net/udp6.hpp
index 7c7decd8f..971dd7847 100644
--- a/src/core/net/udp6.hpp
+++ b/src/core/net/udp6.hpp
@@ -463,4 +463,4 @@ public:
 } // namespace Ip6
 } // namespace ot
 
-#endif // NET_UDP6_HPP_
+#endif // UDP6_HPP_