diff --git a/webrtc/modules/rtp_rtcp/source/byte_io.h b/webrtc/modules/rtp_rtcp/source/byte_io.h
index c69c178078..1724bb0a2e 100644
--- a/webrtc/modules/rtp_rtcp/source/byte_io.h
+++ b/webrtc/modules/rtp_rtcp/source/byte_io.h
@@ -310,12 +310,19 @@ class ByteReader<T, 4, false> {
  public:
   static T ReadBigEndian(const uint8_t* data) {
     static_assert(sizeof(T) >= 4, kSizeErrorMsg);
-    return (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3];
+    return (Get(data, 0) << 24) | (Get(data, 1) << 16) | (Get(data, 2) << 8) |
+           Get(data, 3);
   }
 
   static T ReadLittleEndian(const uint8_t* data) {
     static_assert(sizeof(T) >= 4, kSizeErrorMsg);
-    return data[0] | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);
+    return Get(data, 0) | (Get(data, 1) << 8) | (Get(data, 2) << 16) |
+           (Get(data, 3) << 24);
+  }
+
+ private:
+  inline static T Get(const uint8_t* data, unsigned int index) {
+    return static_cast<T>(data[index]);
   }
 };
 
diff --git a/webrtc/modules/rtp_rtcp/source/byte_io_unittest.cc b/webrtc/modules/rtp_rtcp/source/byte_io_unittest.cc
index 8b626189a0..d0e6cbb6eb 100644
--- a/webrtc/modules/rtp_rtcp/source/byte_io_unittest.cc
+++ b/webrtc/modules/rtp_rtcp/source/byte_io_unittest.cc
@@ -206,5 +206,43 @@ TEST_F(ByteIoTest, Test64SBitLittleEndian) {
       sizeof(int64_t)>(false);
 }
 
+// Sets up a fixed byte array and converts N bytes from the array into a
+// uint64_t. Verifies the value with hard-coded reference.
+TEST(ByteIo, SanityCheckFixedByteArrayUnsignedReadBigEndian) {
+  uint8_t data[8] = {0xFF, 0xEE, 0xDD, 0xCC, 0xBB, 0xAA, 0x99, 0x88};
+  uint64_t value = ByteReader<uint64_t, 2>::ReadBigEndian(data);
+  EXPECT_EQ(static_cast<uint64_t>(0xFFEE), value);
+  value = ByteReader<uint64_t, 3>::ReadBigEndian(data);
+  EXPECT_EQ(static_cast<uint64_t>(0xFFEEDD), value);
+  value = ByteReader<uint64_t, 4>::ReadBigEndian(data);
+  EXPECT_EQ(static_cast<uint64_t>(0xFFEEDDCC), value);
+  value = ByteReader<uint64_t, 5>::ReadBigEndian(data);
+  EXPECT_EQ(static_cast<uint64_t>(0xFFEEDDCCBB), value);
+  value = ByteReader<uint64_t, 6>::ReadBigEndian(data);
+  EXPECT_EQ(static_cast<uint64_t>(0xFFEEDDCCBBAA), value);
+  value = ByteReader<uint64_t, 7>::ReadBigEndian(data);
+  EXPECT_EQ(static_cast<uint64_t>(0xFFEEDDCCBBAA99), value);
+  value = ByteReader<uint64_t, 8>::ReadBigEndian(data);
+  EXPECT_EQ(static_cast<uint64_t>(0xFFEEDDCCBBAA9988), value);
+}
+
+// Same as above, but for little-endian reading.
+TEST(ByteIo, SanityCheckFixedByteArrayUnsignedReadLittleEndian) {
+  uint8_t data[8] = {0xFF, 0xEE, 0xDD, 0xCC, 0xBB, 0xAA, 0x99, 0x88};
+  uint64_t value = ByteReader<uint64_t, 2>::ReadLittleEndian(data);
+  EXPECT_EQ(static_cast<uint64_t>(0xEEFF), value);
+  value = ByteReader<uint64_t, 3>::ReadLittleEndian(data);
+  EXPECT_EQ(static_cast<uint64_t>(0xDDEEFF), value);
+  value = ByteReader<uint64_t, 4>::ReadLittleEndian(data);
+  EXPECT_EQ(static_cast<uint64_t>(0xCCDDEEFF), value);
+  value = ByteReader<uint64_t, 5>::ReadLittleEndian(data);
+  EXPECT_EQ(static_cast<uint64_t>(0xBBCCDDEEFF), value);
+  value = ByteReader<uint64_t, 6>::ReadLittleEndian(data);
+  EXPECT_EQ(static_cast<uint64_t>(0xAABBCCDDEEFF), value);
+  value = ByteReader<uint64_t, 7>::ReadLittleEndian(data);
+  EXPECT_EQ(static_cast<uint64_t>(0x99AABBCCDDEEFF), value);
+  value = ByteReader<uint64_t, 8>::ReadLittleEndian(data);
+  EXPECT_EQ(static_cast<uint64_t>(0x8899AABBCCDDEEFF), value);
+}
 }  // namespace
 }  // namespace webrtc