diff --git a/rust/src/data_structures.rs b/rust/src/data_structures.rs
index 0e22c9311f..07fb5247af 100644
--- a/rust/src/data_structures.rs
+++ b/rust/src/data_structures.rs
@@ -98,11 +98,11 @@ impl ListenInfo {
 pub struct SocketFlags {
     /// Disable dual-stack support so only IPv6 is used (only if ip is IPv6).
     /// Defaults to false.
-    pub ipv6_only: Option<bool>,
+    pub ipv6_only: bool,
     /// Make different transports bind to the same ip and port (only for UDP).
     /// Useful for multicast scenarios with plain transport. Use with caution.
     /// Defaults to false.
-    pub udp_reuse_port: Option<bool>,
+    pub udp_reuse_port: bool,
 }
 
 impl SocketFlags {
diff --git a/rust/tests/integration/plain_transport.rs b/rust/tests/integration/plain_transport.rs
index 9567e6dc69..c132724b81 100644
--- a/rust/tests/integration/plain_transport.rs
+++ b/rust/tests/integration/plain_transport.rs
@@ -440,6 +440,7 @@ fn create_two_transports_binding_to_same_ip_port_with_udp_reuse_port_flag_succee
                     announced_ip: None,
                     port: Some(port),
                     flags: Some(SocketFlags {
+                        ipv6_only: false,
                         udp_reuse_port: true,
                     }),
                     send_buffer_size: None,
@@ -458,6 +459,7 @@ fn create_two_transports_binding_to_same_ip_port_with_udp_reuse_port_flag_succee
                     announced_ip: None,
                     port: Some(port),
                     flags: Some(SocketFlags {
+                        ipv6_only: false,
                         udp_reuse_port: true,
                     }),
                     send_buffer_size: None,
@@ -487,6 +489,7 @@ fn create_two_transports_binding_to_same_ip_port_without_udp_reuse_port_flag_fai
                     announced_ip: None,
                     port: Some(port),
                     flags: Some(SocketFlags {
+                        ipv6_only: false,
                         udp_reuse_port: false,
                     }),
                     send_buffer_size: None,
@@ -505,6 +508,7 @@ fn create_two_transports_binding_to_same_ip_port_without_udp_reuse_port_flag_fai
                     announced_ip: None,
                     port: Some(port),
                     flags: Some(SocketFlags {
+                        ipv6_only: false,
                         udp_reuse_port: false,
                     }),
                     send_buffer_size: None,