diff --git a/src/libGLESv2/Texture.h b/src/libGLESv2/Texture.h
index 4348c8a..143f7ac 100644
--- a/src/libGLESv2/Texture.h
+++ b/src/libGLESv2/Texture.h
@@ -57,6 +57,8 @@
     IMPLEMENTATION_MAX_TEXTURE_LEVELS = 15   // 1+log2 of MAX_TEXTURE_SIZE
 };
 
+bool IsMipmapFiltered(const SamplerState &samplerState);
+
 class Texture : public RefCountObject
 {
   public: