diff --git a/keymap.fnl b/keymap.fnl
index 40be3d6..08f56c7 100644
--- a/keymap.fnl
+++ b/keymap.fnl
@@ -19,6 +19,7 @@
               :Super_R                  ; menu key? not on my keyboard
               :Alt_L
               :Alt_R
+              :Num_Lock
               :ISO_Level3_Shift         ; AltGr
               ]]
          (collect [_ n (ipairs names)]
@@ -27,6 +28,10 @@
 (fn modifier? [keyval]
   (. modifier-keyvals keyval))
 
+(fn ignored-modifier? [mod]
+  (= mod :MOD2_MASK) ; numlock
+  )
+
 (fn keychord->spec [keychord]
   (let [Mod Gdk.ModifierType
         symbol (keychord:match "(%w+)$")
@@ -49,7 +54,9 @@
   (let [modmask
         (accumulate [m 0
                      k _ (pairs event.state)]
-          (bor m (. Gdk.ModifierType k)))]
+          (if (ignored-modifier? k)
+              m
+              (bor m (. Gdk.ModifierType (trace k)))))]
     (spec->index {:keyval event.keyval : modmask})))
 
 (fn compact [xs]