diff --git a/engine/bind/v4k.lua b/engine/bind/v4k.lua
index 5920db0..9c79172 100644
--- a/engine/bind/v4k.lua
+++ b/engine/bind/v4k.lua
@@ -2520,8 +2520,8 @@ handle program;
 mesh_t geometry;
 cubemap_t cubemap;
 int flags;
-unsigned framebuffers[6];
-unsigned textures[6];
+int framebuffers[6];
+int textures[6];
 unsigned char *pixels;
 } skybox_t;
  skybox_t skybox(const char *panorama_or_cubemap_folder, int flags);
diff --git a/engine/joint/v4k.h b/engine/joint/v4k.h
index bd995c9..154318f 100644
--- a/engine/joint/v4k.h
+++ b/engine/joint/v4k.h
@@ -16769,8 +16769,8 @@ typedef struct skybox_t {
     int flags;
 
     // mie
-    unsigned framebuffers[6];
-    unsigned textures[6];
+    int framebuffers[6];
+    int textures[6];
     unsigned char *pixels;
 } skybox_t;
 
@@ -342409,7 +342409,7 @@ skybox_t skybox(const char *asset, int flags) {
 
 void skybox_mie_calc_sh(skybox_t *sky) {
     unsigned WIDTH = 512, HEIGHT = 512;
-    unsigned last_fb;
+    int last_fb;
     int vp[4];
     glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &last_fb);
     glGetIntegerv(GL_VIEWPORT, vp);
diff --git a/engine/split/v4k_render.c b/engine/split/v4k_render.c
index f6bc970..363f45c 100644
--- a/engine/split/v4k_render.c
+++ b/engine/split/v4k_render.c
@@ -2402,7 +2402,7 @@ skybox_t skybox(const char *asset, int flags) {
 
 void skybox_mie_calc_sh(skybox_t *sky) {
     unsigned WIDTH = 512, HEIGHT = 512;
-    unsigned last_fb;
+    int last_fb;
     int vp[4];
     glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &last_fb);
     glGetIntegerv(GL_VIEWPORT, vp);
diff --git a/engine/split/v4k_render.h b/engine/split/v4k_render.h
index 4eba2f9..d66008b 100644
--- a/engine/split/v4k_render.h
+++ b/engine/split/v4k_render.h
@@ -614,8 +614,8 @@ typedef struct skybox_t {
     int flags;
 
     // mie
-    unsigned framebuffers[6];
-    unsigned textures[6];
+    int framebuffers[6];
+    int textures[6];
     unsigned char *pixels;
 } skybox_t;
 
diff --git a/engine/v4k.c b/engine/v4k.c
index 0b9b4f5..745fd73 100644
--- a/engine/v4k.c
+++ b/engine/v4k.c
@@ -13311,7 +13311,7 @@ skybox_t skybox(const char *asset, int flags) {
 
 void skybox_mie_calc_sh(skybox_t *sky) {
     unsigned WIDTH = 512, HEIGHT = 512;
-    unsigned last_fb;
+    int last_fb;
     int vp[4];
     glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &last_fb);
     glGetIntegerv(GL_VIEWPORT, vp);
diff --git a/engine/v4k.h b/engine/v4k.h
index 446b207..1269c4f 100644
--- a/engine/v4k.h
+++ b/engine/v4k.h
@@ -2852,8 +2852,8 @@ typedef struct skybox_t {
     int flags;
 
     // mie
-    unsigned framebuffers[6];
-    unsigned textures[6];
+    int framebuffers[6];
+    int textures[6];
     unsigned char *pixels;
 } skybox_t;