diff --git a/src/firstboot/firstboot.c b/src/firstboot/firstboot.c
index 215c059ee2..f586c2ef7f 100644
--- a/src/firstboot/firstboot.c
+++ b/src/firstboot/firstboot.c
@@ -68,7 +68,7 @@ static bool press_any_key(void) {
         printf("-- Press any key to proceed --");
         fflush(stdout);
 
-        read_one_char(stdin, &k, USEC_INFINITY, &need_nl);
+        (void) read_one_char(stdin, &k, USEC_INFINITY, &need_nl);
 
         if (need_nl)
                 putchar('\n');