3 files changed, 7 insertions, 6 deletions
diff --git a/src/mongo/bson/bsonobjbuilder.cpp b/src/mongo/bson/bsonobjbuilder.cpp
index 3b8c3774c6b..aaa8b2fafcc 100644
--- a/src/mongo/bson/bsonobjbuilder.cpp
+++ b/src/mongo/bson/bsonobjbuilder.cpp
@@ -230,7 +230,7 @@ BSONObjBuilder::~BSONObjBuilder() {
     // BufBuilder but do not own it ourselves, then we must call _done to write in the
     // length. Otherwise, we own this memory and its lifetime ends with us, therefore
     // we can elide the write.
-    if (!_doneCalled && _b.buf() && _buf.getSize() == 0) {
+    if (!_doneCalled && _b.buf() && _buf.capacity() == 0) {
         _done();
     }
 }
diff --git a/src/mongo/bson/util/builder.h b/src/mongo/bson/util/builder.h
index 64b578faafd..4d66fdee83e 100644
--- a/src/mongo/bson/util/builder.h
+++ b/src/mongo/bson/util/builder.h
@@ -273,15 +273,16 @@ public:
         str.copyTo(grow(len), includeEndingNull);
     }
 
-    /** @return length of current std::string */
+    /** Returns the length of data in the current buffer */
     int len() const {
         return l;
     }
     void setlen(int newLen) {
         l = newLen;
     }
-    /** @return size of the buffer */
-    int getSize() const {
+
+    /** Returns the capacity of the buffer */
+    int capacity() const {
         return size;
     }
 
diff --git a/src/mongo/db/index/index_build_interceptor.cpp b/src/mongo/db/index/index_build_interceptor.cpp
index d1c2e0d6b5d..5e5568dc6c8 100644
--- a/src/mongo/db/index/index_build_interceptor.cpp
+++ b/src/mongo/db/index/index_build_interceptor.cpp
@@ -406,7 +406,7 @@ Status IndexBuildInterceptor::sideWrite(OperationContext* opCtx,
         // from getBuffer().
         builder.reset();
         keyString.serialize(builder);
-        BSONBinData binData(builder.buf(), builder.getSize(), BinDataGeneral);
+        BSONBinData binData(builder.buf(), builder.len(), BinDataGeneral);
         toInsert.emplace_back(BSON("op" << (op == Op::kInsert ? "i" : "d") << "key" << binData));
     }
 
@@ -417,7 +417,7 @@ Status IndexBuildInterceptor::sideWrite(OperationContext* opCtx,
         for (const auto& keyString : multikeyMetadataKeys) {
             builder.reset();
             keyString.serialize(builder);
-            BSONBinData binData(builder.buf(), builder.getSize(), BinDataGeneral);
+            BSONBinData binData(builder.buf(), builder.len(), BinDataGeneral);
             toInsert.emplace_back(BSON("op"
                                        << "i"
                                        << "key" << binData));