diff --git a/GL/framebuffer.c b/GL/framebuffer.c
index 33f5a3a..96c1d43 100644
--- a/GL/framebuffer.c
+++ b/GL/framebuffer.c
@@ -268,14 +268,14 @@ void APIENTRY glGenerateMipmapEXT(GLenum target) {
 
     TextureObject* tex = _glGetBoundTexture();
 
-    if(tex->width != tex->height) {
-        fprintf(stderr, "[GL ERROR] Mipmaps cannot be supported on non-square textures\n");
+    if(!tex || !tex->data || !tex->mipmapCount) {
         _glKosThrowError(GL_INVALID_OPERATION, __func__);
         _glKosPrintError();
         return;
     }
 
-    if(!tex || !tex->data || !tex->mipmapCount) {
+    if(tex->width != tex->height) {
+        fprintf(stderr, "[GL ERROR] Mipmaps cannot be supported on non-square textures\n");
         _glKosThrowError(GL_INVALID_OPERATION, __func__);
         _glKosPrintError();
         return;