diff --git a/package/yast2-users.changes b/package/yast2-users.changes
index 59d61f545..2ef74fad8 100644
--- a/package/yast2-users.changes
+++ b/package/yast2-users.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Fri Apr  6 13:34:48 UTC 2018 - igonzalezsosa@suse.com
+
+- Do not crash if root user is not defined (bsc#1088183).
+- 3.2.15
+
 -------------------------------------------------------------------
 Thu Mar  1 09:36:25 UTC 2018 - mvidner@suse.com
 
diff --git a/package/yast2-users.spec b/package/yast2-users.spec
index 508edd020..8dafc44e8 100644
--- a/package/yast2-users.spec
+++ b/package/yast2-users.spec
@@ -17,7 +17,7 @@
 
 
 Name:           yast2-users
-Version:        3.2.14
+Version:        3.2.15
 Release:        0
 
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
diff --git a/src/modules/Users.pm b/src/modules/Users.pm
index 102e6d4d9..3c901abb3 100644
--- a/src/modules/Users.pm
+++ b/src/modules/Users.pm
@@ -4070,10 +4070,13 @@ sub WriteAuthorizedKeys {
         }
     }
 
-    # Write root authorized keys(bsc#1066342)
-    my %root_user = %{$modified_users{"system"}{"root"}};
-    if ($root_user{"modified"} eq "imported") {
-        SSHAuthorizedKeys->write_keys($root_user{"homeDirectory"});
+    # Do not crash if 'root' is undefined (bsc#1088183)
+    if (defined($modified_users{"system"}{"root"})) {
+      # Write root authorized keys(bsc#1066342)
+      my %root_user = %{$modified_users{"system"}{"root"}};
+      if ($root_user{"modified"} eq "imported") {
+          SSHAuthorizedKeys->write_keys($root_user{"homeDirectory"});
+      }
     }
 }
 
diff --git a/test/users_auto_test.rb b/test/users_auto_test.rb
index 88bb7f4d4..fef92b8ce 100755
--- a/test/users_auto_test.rb
+++ b/test/users_auto_test.rb
@@ -17,7 +17,6 @@
   end
 
   describe "#AutoYaST" do
-
     context "Import" do
       before do
         allow(Yast::WFM).to receive(:Args).with(no_args).and_return([func,users])
@@ -44,5 +43,24 @@
         end
       end
     end
+
+    context "#Write" do
+      let(:func) { "Write" }
+
+      before do
+        allow(Yast::WFM).to receive(:Args).with(no_args).and_return([func])
+        allow(Yast::WFM).to receive(:Args).with(0).and_return(func)
+      end
+
+      context "when root user is not defined" do
+        before do
+          Yast::Users.Import({})
+        end
+
+        it "returns true" do
+          expect(subject.main).to eq(true)
+        end
+      end
+    end
   end
 end