diff --git a/src/core/button.rs b/src/core/button.rs
index 7343c75..bbd44f4 100644
--- a/src/core/button.rs
+++ b/src/core/button.rs
@@ -488,7 +488,8 @@ impl<D: Display, K: Keyboard> Button<D, K> {
         let meta_pressed = modifiers[MOD_META - 1] != ModState::Released;
         let mods_pressed = ctrl_pressed || alt_pressed || meta_pressed;
 
-        if part.sym() == Keysym::Num_Lock
+        if part.sym() == Keysym::Scroll_Lock
+        || part.sym() == Keysym::Num_Lock
         || part.sym() == Keysym::Caps_Lock {
             return;
         }
@@ -510,6 +511,9 @@ impl<D: Display, K: Keyboard> Button<D, K> {
         let old_height = self.layout.height();
 
         match sym {
+            Keysym::Scroll_Lock => {
+                self.layout.switch_greekmath();
+            },
             Keysym::Num_Lock => {
                 self.layout.switch_numeric();
             },