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;
 
diff --git a/minui/resources.c b/minui/resources.c
index df813cb..a6528b3 100644
--- a/minui/resources.c
+++ b/minui/resources.c
@@ -95,7 +95,7 @@
     png_read_info(png_ptr, info_ptr);
 
     int color_type, bit_depth;
-    size_t width, height;
+    png_uint_32 width, height;
     png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth,
             &color_type, NULL, NULL, NULL);