diff --git a/minui/graphics_fbdev.c b/minui/graphics_fbdev.c
index 6a6330b..bb91975 100644
--- a/minui/graphics_fbdev.c
+++ b/minui/graphics_fbdev.c
@@ -21,6 +21,7 @@
 #include <fcntl.h>
 #include <stdio.h>
 
+#include <sys/cdefs.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
 #include <sys/types.h>
@@ -55,7 +56,7 @@
     return &my_backend;
 }
 
-static void fbdev_blank(minui_backend* backend, bool blank)
+static void fbdev_blank(minui_backend* backend __unused, bool blank)
 {
     int ret;
 
@@ -174,7 +175,7 @@
     return gr_draw;
 }
 
-static gr_surface fbdev_flip(minui_backend* backend) {
+static gr_surface fbdev_flip(minui_backend* backend __unused) {
     if (double_buffered) {
         // Change gr_draw to point to the buffer currently displayed,
         // then flip the driver so we're displaying the other buffer
@@ -189,7 +190,7 @@
     return gr_draw;
 }
 
-static void fbdev_exit(minui_backend* backend) {
+static void fbdev_exit(minui_backend* backend __unused) {
     close(fb_fd);
     fb_fd = -1;