diff --git a/src/Shader/SamplerCore.cpp b/src/Shader/SamplerCore.cpp
index 6b8290d..5f9888c 100644
--- a/src/Shader/SamplerCore.cpp
+++ b/src/Shader/SamplerCore.cpp
@@ -506,7 +506,8 @@
 		for(int i = 0; i < 4; ++i)
 		{
 			Int baseLevel = *Pointer<Int>(texture + OFFSET(Texture, baseLevel));
-			Pointer<Byte> mipmap = texture + OFFSET(Texture, mipmap) + (As<Int>(Extract(lod, i)) + baseLevel) * sizeof(Mipmap);
+			Int index = Min(As<UInt>(As<Int>(Extract(lod, i)) + baseLevel), MIPMAP_LEVELS - 1);
+			Pointer<Byte> mipmap = texture + OFFSET(Texture, mipmap) + index * sizeof(Mipmap);
 			size.x = Insert(size.x, As<Float>(Int(*Pointer<Short>(mipmap + OFFSET(Mipmap, width)))), i);
 			size.y = Insert(size.y, As<Float>(Int(*Pointer<Short>(mipmap + OFFSET(Mipmap, height)))), i);
 			size.z = Insert(size.z, As<Float>(Int(*Pointer<Short>(mipmap + OFFSET(Mipmap, depth)))), i);