diff --git a/lib/renderers/wayland/wayland.h b/lib/renderers/wayland/wayland.h
index 3e9f869..88f7ad4 100644
--- a/lib/renderers/wayland/wayland.h
+++ b/lib/renderers/wayland/wayland.h
@@ -33,8 +33,8 @@ enum mask {
     MASK_LAST
 };
 
-const char *BM_XKB_MASK_NAMES[MASK_LAST];
-const enum mod_bit BM_XKB_MODS[MASK_LAST];
+extern const char *BM_XKB_MASK_NAMES[MASK_LAST];
+extern const enum mod_bit BM_XKB_MODS[MASK_LAST];
 
 struct xkb {
     struct xkb_state *state;