diff --git a/lib/facter/util/facts/posix/virtual_detector.rb b/lib/facter/util/facts/posix/virtual_detector.rb
index 80a3c98b11..ff2c56a6f7 100644
--- a/lib/facter/util/facts/posix/virtual_detector.rb
+++ b/lib/facter/util/facts/posix/virtual_detector.rb
@@ -8,9 +8,9 @@ module VirtualDetector
           class << self
             def platform
               @fact_value ||= # rubocop:disable Naming/MemoizedInstanceVariableName
-                check_docker_lxc || check_freebsd || check_gce || retrieve_from_virt_what || \
-                check_vmware || check_open_vz || check_vserver || check_xen || check_other_facts || \
-                check_lspci || 'physical'
+                check_docker_lxc || check_freebsd || check_gce || check_illumos_lx || \
+                retrieve_from_virt_what || check_vmware || check_open_vz || check_vserver || \
+                check_xen || check_other_facts || check_lspci || 'physical'
             end
 
             private
@@ -24,6 +24,10 @@ def check_gce
               'gce' if bios_vendor&.include?('Google')
             end
 
+            def check_illumos_lx
+              'illumos-lx' if Facter::Resolvers::Uname.resolve(:kernelversion) == 'BrandZ virtual linux'
+            end
+
             def check_vmware
               Facter::Resolvers::Vmware.resolve(:vm)
             end
diff --git a/spec/facter/util/facts/posix/virtual_detector_spec.rb b/spec/facter/util/facts/posix/virtual_detector_spec.rb
index 23366d9d44..88903d000b 100644
--- a/spec/facter/util/facts/posix/virtual_detector_spec.rb
+++ b/spec/facter/util/facts/posix/virtual_detector_spec.rb
@@ -241,6 +241,19 @@
       end
     end
 
+    context 'when illumos-lx' do
+      let(:value) { 'illumos-lx' }
+
+      before do
+        allow(Facter::Resolvers::VirtWhat).to receive(:resolve).with(:vm).and_return('lxc')
+        allow(Facter::Resolvers::Uname).to receive(:resolve).with(:kernelversion).and_return('BrandZ virtual linux')
+      end
+
+      it 'returns illumos-lx' do
+        expect(detector.platform).to eq(value)
+      end
+    end
+
     context 'when all resolvers return nil ' do
       let(:vm) { 'physical' }