diff --git a/data/theme/gtk-styles.css b/data/theme/gtk-styles.css
index ddfe7f9f..e7aa29e2 100644
--- a/data/theme/gtk-styles.css
+++ b/data/theme/gtk-styles.css
@@ -173,13 +173,22 @@ calendar-view.second-view-header {
     border-right-style: solid;
 }
 
-.year-view scrolledwindow {
-    border-top-width: 0;
-    border-bottom-width: 0;
-}
-
 .year-view button {
     border-radius: 0;
+    border-bottom-style: none;
+}
+
+.year-view button:dir(ltr) {
+    border-right-style: none;
+}
+
+.year-view button:dir(rtl) {
+    border-left-style: none;
+}
+
+
+.year-view scrolledwindow {
+    border-top-width: 0;
     border-bottom-width: 0;
 }