diff --git a/GPU/GLES/TextureCache.cpp b/GPU/GLES/TextureCache.cpp
index 4898ba3a8e..907641f05d 100644
--- a/GPU/GLES/TextureCache.cpp
+++ b/GPU/GLES/TextureCache.cpp
@@ -504,7 +504,18 @@ void TextureCache::UpdateSamplingParams(TexCacheEntry &entry, bool force) {
 		float lodBias = (float)(int)(s8)((gstate.texlevel >> 16) & 0xFF) / 16.0f;
 		if (force || entry.lodBias != lodBias) {
 #ifndef USING_GLES2
-			glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_LOD_BIAS, lodBias);
+			int mode = gstate.texlevel & 0x3;
+			switch (mode) {
+			case GE_TEXBIAS_MODE_AUTO:
+				// TODO
+				break;
+			case GE_TEXBIAS_MODE_CONST:
+				glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_LOD_BIAS, lodBias);
+				break;
+			case GE_TEXBIAS_MODE_SLOPE:
+				// TODO
+				break;
+			}
 #endif
 			entry.lodBias = lodBias;
 		}
diff --git a/GPU/GLES/TextureCache.h b/GPU/GLES/TextureCache.h
index 43688bd2c9..aabf805b66 100644
--- a/GPU/GLES/TextureCache.h
+++ b/GPU/GLES/TextureCache.h
@@ -39,6 +39,12 @@ enum FramebufferNotification {
 	NOTIFY_FB_DESTROYED,
 };
 
+enum TextureLevelMode {
+	GE_TEXBIAS_MODE_AUTO = 0,
+	GE_TEXBIAS_MODE_CONST = 1,
+	GE_TEXBIAS_MODE_SLOPE = 2,
+};
+
 class TextureCache {
 public:
 	TextureCache();