diff --git a/gtk3/main.c b/gtk3/main.c
index 576a363..d8b2209 100644
--- a/gtk3/main.c
+++ b/gtk3/main.c
@@ -30,10 +30,10 @@ static Rect rect;
 static bool vram_viewer_visible = false;
 static bool running = true;
 
-static const size_t tileset_buffer_length = 256 * 192 * 4;
+#define tileset_buffer_length 256 * 192 * 4
 static uint32_t tileset_buffer[tileset_buffer_length] = {0};
 
-static const size_t tilemap_buffer_length = 256 * 256 * 4;
+#define tilemap_buffer_length 256 * 256 * 4
 static uint32_t tilemap_buffer[tilemap_buffer_length] = {0};
 
 static uint8_t pressed_buttons;
diff --git a/gtk3/shader.c b/gtk3/shader.c
index a247c4b..aca7624 100644
--- a/gtk3/shader.c
+++ b/gtk3/shader.c
@@ -1,5 +1,3 @@
-#include <glib.h>
-#include <gio/gio.h>
 #include "shader.h"
 
 static const char *vertex_shader = "\n\
diff --git a/gtk3/shader.h b/gtk3/shader.h
index d276f73..6923738 100644
--- a/gtk3/shader.h
+++ b/gtk3/shader.h
@@ -2,6 +2,9 @@
 #define shader_h
 #include <epoxy/gl.h>
 #include <stdbool.h>
+#include <string.h>
+#include <glib.h>
+#include <gio/gio.h>
 
 typedef struct shader_s {
     GLuint resolution_uniform;