diff --git a/media/libstagefright/foundation/ABuffer.cpp b/media/libstagefright/foundation/ABuffer.cpp
index c8965d910996d86d329e905aa8746e065b1f26f9..c79384cb0fa5a56a7f35b8c0d78d3c85a4a1202c 100644
--- a/media/libstagefright/foundation/ABuffer.cpp
+++ b/media/libstagefright/foundation/ABuffer.cpp
@@ -67,7 +67,7 @@ ABuffer::~ABuffer() {
 
 void ABuffer::setRange(size_t offset, size_t size) {
     CHECK_LE(offset, mCapacity);
-    CHECK_LE(offset + size, mCapacity);
+    CHECK_LE(size, mCapacity - offset);
 
     mRangeOffset = offset;
     mRangeLength = size;