diff --git a/Common/GPU/OpenGL/thin3d_gl.cpp b/Common/GPU/OpenGL/thin3d_gl.cpp
index 3088abc22f..e26a666748 100644
--- a/Common/GPU/OpenGL/thin3d_gl.cpp
+++ b/Common/GPU/OpenGL/thin3d_gl.cpp
@@ -821,11 +821,14 @@ OpenGLTexture::OpenGLTexture(GLRenderManager *render, const TextureDesc &desc) :
 		return;
 
 	int level = 0;
+	int width = width_;
+	int height = height_;
+	int depth = depth_;
 	for (auto data : desc.initData) {
-		SetImageData(0, 0, 0, width_, height_, depth_, level, 0, data, desc.initDataCallback);
-		width_ = (width_ + 1) / 2;
-		height_ = (height_ + 1) / 2;
-		depth_ = (depth_ + 1) / 2;
+		SetImageData(0, 0, 0, width, height, depth, level, 0, data, desc.initDataCallback);
+		width = (width + 1) / 2;
+		height = (height + 1) / 2;
+		depth = (depth + 1) / 2;
 		level++;
 	}
 	mipLevels_ = desc.generateMips ? desc.mipLevels : level;