diff --git a/lib/base/fifo.cpp b/lib/base/fifo.cpp
index 8653f5176..df5fce509 100644
--- a/lib/base/fifo.cpp
+++ b/lib/base/fifo.cpp
@@ -54,19 +54,6 @@ void FIFO::Optimize()
 	}
 }
 
-size_t FIFO::Peek(void *buffer, size_t count, bool allow_partial)
-{
-	ASSERT(allow_partial);
-
-	if (count > m_DataSize)
-		count = m_DataSize;
-
-	if (buffer)
-		std::memcpy(buffer, m_Buffer + m_Offset, count);
-
-	return count;
-}
-
 /**
  * Implements IOQueue::Read.
  */
diff --git a/lib/base/fifo.hpp b/lib/base/fifo.hpp
index a8273c1ba..dbb37b570 100644
--- a/lib/base/fifo.hpp
+++ b/lib/base/fifo.hpp
@@ -23,7 +23,6 @@ public:
 
 	~FIFO() override;
 
-	size_t Peek(void *buffer, size_t count, bool allow_partial = false) override;
 	size_t Read(void *buffer, size_t count, bool allow_partial = false) override;
 	void Write(const void *buffer, size_t count) override;
 	void Close() override;
diff --git a/lib/base/stream.cpp b/lib/base/stream.cpp
index e55838523..e4a66586e 100644
--- a/lib/base/stream.cpp
+++ b/lib/base/stream.cpp
@@ -29,11 +29,6 @@ void Stream::Shutdown()
 	BOOST_THROW_EXCEPTION(std::runtime_error("Stream does not support Shutdown()."));
 }
 
-size_t Stream::Peek(void *buffer, size_t count, bool allow_partial)
-{
-	BOOST_THROW_EXCEPTION(std::runtime_error("Stream does not support Peek()."));
-}
-
 void Stream::SignalDataAvailable()
 {
 	OnDataAvailable(this);
diff --git a/lib/base/stream.hpp b/lib/base/stream.hpp
index 6bc8fed72..69bdff872 100644
--- a/lib/base/stream.hpp
+++ b/lib/base/stream.hpp
@@ -54,17 +54,6 @@ class Stream : public Object
 public:
 	DECLARE_PTR_TYPEDEFS(Stream);
 
-	/**
-	 * Reads data from the stream without removing it from the stream buffer.
-	 *
-	 * @param buffer The buffer where data should be stored. May be nullptr if you're
-	 *		 not actually interested in the data.
-	 * @param count The number of bytes to read from the queue.
-	 * @param allow_partial Whether to allow partial reads.
-	 * @returns The number of bytes actually read.
-	 */
-	virtual size_t Peek(void *buffer, size_t count, bool allow_partial = false);
-
 	/**
 	 * Reads data from the stream.
 	 *