diff --git a/tools/tools-common.c b/tools/tools-common.c
index 0e63648..210db52 100644
--- a/tools/tools-common.c
+++ b/tools/tools-common.c
@@ -200,7 +200,7 @@ tools_print_keycode_state(char *prefix,
     printf("keysyms [ ");
     for (int i = 0; i < nsyms; i++) {
         xkb_keysym_get_name(syms[i], s, sizeof(s));
-        printf("%-*s ", (int) sizeof(s), s);
+        printf("%-*s ", XKB_KEYSYM_NAME_MAX_SIZE, s);
     }
     printf("] ");