diff --git a/spec/ruby/library/socket/ancillarydata/initialize_spec.rb b/spec/ruby/library/socket/ancillarydata/initialize_spec.rb
index d199074a65..c700404799 100644
--- a/spec/ruby/library/socket/ancillarydata/initialize_spec.rb
+++ b/spec/ruby/library/socket/ancillarydata/initialize_spec.rb
@@ -106,7 +106,7 @@ with_feature :ancillary_data do
         Socket::AncillaryData.new(:INET, :SOCKET, :RIGHTS, '').type.should == Socket::SCM_RIGHTS
       end
 
-      platform_is_not :"solaris2.10" do
+      platform_is_not :"solaris2.10", :aix do
         it 'sets the type to SCM_TIMESTAMP when using :TIMESTAMP as the type argument' do
           Socket::AncillaryData.new(:INET, :SOCKET, :TIMESTAMP, '').type.should == Socket::SCM_TIMESTAMP
         end
diff --git a/spec/ruby/library/socket/ancillarydata/unix_rights_spec.rb b/spec/ruby/library/socket/ancillarydata/unix_rights_spec.rb
index 28eb116fca..34d954af81 100644
--- a/spec/ruby/library/socket/ancillarydata/unix_rights_spec.rb
+++ b/spec/ruby/library/socket/ancillarydata/unix_rights_spec.rb
@@ -50,7 +50,7 @@ with_feature :ancillary_data do
       lambda { data.unix_rights }.should raise_error(TypeError)
     end
 
-    platform_is_not :"solaris2.10" do
+    platform_is_not :"solaris2.10", :aix do
       it 'raises TypeError when the type is not SCM_RIGHTS' do
         data = Socket::AncillaryData.new(:INET, :SOCKET, :TIMESTAMP, '')