diff --git a/themes/windows/main.css b/themes/windows/main.css
index 8d6162c2a..e52de4cf3 100644
--- a/themes/windows/main.css
+++ b/themes/windows/main.css
@@ -130,7 +130,6 @@
     qproperty-fixedsize: 22px 28px;
 }
 
-/*TabWidget*/
 #tabbar
 {
     min-height: 30px;
@@ -225,6 +224,16 @@
     margin-left: 0;
 }
 
+#tabbar::tab:!selected:only-one
+{
+    margin-left: 0;
+}
+
+#tabbar::tab:!selected:hover:only-one
+{
+    margin-left: 0;
+}
+
 /*IconProvider*/
 IconProvider
 {
diff --git a/themes/windows/rtl.css b/themes/windows/rtl.css
index fde964041..5e4f596d0 100644
--- a/themes/windows/rtl.css
+++ b/themes/windows/rtl.css
@@ -66,3 +66,13 @@
 {
     margin-right: 0;
 }
+
+#tabbar::tab:!selected:only-one
+{
+    margin-right: 0;
+}
+
+#tabbar::tab:!selected:hover:only-one
+{
+    margin-right: 0;
+}