diff --git a/services/surfaceflinger/Utils/RingBuffer.h b/services/surfaceflinger/Utils/RingBuffer.h
index 198e7b2..215472b 100644
--- a/services/surfaceflinger/Utils/RingBuffer.h
+++ b/services/surfaceflinger/Utils/RingBuffer.h
@@ -43,8 +43,10 @@
     }
 
     T& front() { return (*this)[0]; }
+    const T& front() const { return (*this)[0]; }
 
     T& back() { return (*this)[size() - 1]; }
+    const T& back() const { return (*this)[size() - 1]; }
 
     T& operator[](size_t index) {
         return mBuffer[(static_cast<size_t>(mHead + 1) + index) % mCount];