diff --git a/container/SharedRingBuffer.cpp b/container/SharedRingBuffer.cpp
index 86277a80..2fde2851 100644
--- a/container/SharedRingBuffer.cpp
+++ b/container/SharedRingBuffer.cpp
@@ -43,6 +43,16 @@ ReturnValue_t SharedRingBuffer::deleteDataProtected(size_t amount,
 	return SimpleRingBuffer::deleteData(amount, deleteRemaining, trueAmount);
 }
 
+size_t SharedRingBuffer::getExcessBytes() const {
+	MutexHelper(mutex, mutexTimeout);
+	return SimpleRingBuffer::getExcessBytes();
+}
+
+void SharedRingBuffer::moveExcessBytesToStart() {
+	MutexHelper(mutex, mutexTimeout);
+	return SimpleRingBuffer::moveExcessBytesToStart();
+}
+
 size_t SharedRingBuffer::getAvailableReadDataProtected(uint8_t n) const {
 	MutexHelper(mutex, mutexTimeout);
 	return ((write + size) - read[n]) % size;
diff --git a/container/SharedRingBuffer.h b/container/SharedRingBuffer.h
index 7fed7b22..8d68b967 100644
--- a/container/SharedRingBuffer.h
+++ b/container/SharedRingBuffer.h
@@ -34,6 +34,14 @@ public:
 
 	void setMutexTimeout(dur_millis_t newTimeout);
 
+	virtual size_t getExcessBytes() const override;
+	/**
+	 * Helper functions which moves any excess bytes to the start
+	 * of the ring buffer.
+	 * @return
+	 */
+	virtual void moveExcessBytesToStart() override;
+
 	/** Performs mutex protected SimpleRingBuffer::getFreeElement call */
 	ReturnValue_t getFreeElementProtected(uint8_t** writePtr, size_t amount);
 
diff --git a/container/SimpleRingBuffer.cpp b/container/SimpleRingBuffer.cpp
index cad1a48e..36880813 100644
--- a/container/SimpleRingBuffer.cpp
+++ b/container/SimpleRingBuffer.cpp
@@ -39,7 +39,7 @@ ReturnValue_t SimpleRingBuffer::getFreeElement(uint8_t **writePointer,
             if((amount - amountTillWrap + excessBytes) > maxExcessBytes) {
                 return HasReturnvaluesIF::RETURN_FAILED;
             }
-            excessBytes += amount - amountTillWrap;
+            excessBytes = amount - amountTillWrap;
         }
         *writePointer = &buffer[write];
         incrementWrite(amount);
diff --git a/container/SimpleRingBuffer.h b/container/SimpleRingBuffer.h
index 2627541f..0784e415 100644
--- a/container/SimpleRingBuffer.h
+++ b/container/SimpleRingBuffer.h
@@ -64,13 +64,13 @@ public:
 	 */
 	ReturnValue_t getFreeElement(uint8_t** writePointer, size_t amount);
 
-	size_t getExcessBytes() const;
+	virtual size_t getExcessBytes() const;
 	/**
 	 * Helper functions which moves any excess bytes to the start
 	 * of the ring buffer.
 	 * @return
 	 */
-	void moveExcessBytesToStart();
+	virtual void moveExcessBytesToStart();
 
 	/**
 	 * Read from circular buffer at read pointer.