diff --git a/lib/licenses.nix b/lib/licenses.nix
index 40135914b8cd..df72299db658 100644
--- a/lib/licenses.nix
+++ b/lib/licenses.nix
@@ -1213,6 +1213,11 @@ lib.mapAttrs mkLicense (
       fullName = "SGML UG SGML Parser Materials license";
     };
 
+    sissl11 = {
+      spdxId = "SISSL";
+      fullName = "Sun Industry Standards Source License 1.1";
+    };
+
     sleepycat = {
       spdxId = "Sleepycat";
       fullName = "Sleepycat License";
diff --git a/pkgs/by-name/op/openvswitch/package.nix b/pkgs/by-name/op/openvswitch/package.nix
index 112f08c29488..3479014f9bcb 100644
--- a/pkgs/by-name/op/openvswitch/package.nix
+++ b/pkgs/by-name/op/openvswitch/package.nix
@@ -160,7 +160,11 @@ stdenv.mkDerivation rec {
       to VMware's vNetwork distributed vswitch or Cisco's Nexus 1000V.
     '';
     homepage = "https://www.openvswitch.org/";
-    license = lib.licenses.asl20;
+    license = with lib.licenses; [
+      asl20
+      lgpl21Plus # ovs-bugtool
+      sissl11 # lib/sflow
+    ];
     maintainers = with lib.maintainers; [
       adamcstephens
       booxter
diff --git a/pkgs/by-name/ov/ovn/package.nix b/pkgs/by-name/ov/ovn/package.nix
index ba05304c0f67..cf0ef482dab0 100644
--- a/pkgs/by-name/ov/ovn/package.nix
+++ b/pkgs/by-name/ov/ovn/package.nix
@@ -141,7 +141,11 @@ stdenv.mkDerivation (finalAttrs: {
     '';
     homepage = "https://www.ovn.org";
     changelog = "https://github.com/ovn-org/ovn/blob/refs/tags/${finalAttrs.src.tag}/NEWS";
-    license = lib.licenses.asl20;
+    license = with lib.licenses; [
+      asl20
+      lgpl21Plus # bugtool plugins
+      sissl11 # lib/sflow from ovs submodule
+    ];
     maintainers = with lib.maintainers; [
       adamcstephens
       booxter