diff --git a/src/sampled_values/sv_publisher.c b/src/sampled_values/sv_publisher.c
index 315417ca..6bac2cb6 100644
--- a/src/sampled_values/sv_publisher.c
+++ b/src/sampled_values/sv_publisher.c
@@ -627,6 +627,24 @@ SVPublisher_ASDU_setTimestamp(SVPublisher_ASDU self, int index, Timestamp value)
     }
 }
 
+int
+SVPublisher_ASDU_addQuality(SVPublisher_ASDU self)
+{
+    int index = self->dataSize;
+    self->dataSize += 4;
+    return index;
+}
+
+void
+SVPublisher_ASDU_setQuality(SVPublisher_ASDU self, int index, Quality value)
+{
+    uint8_t* buffer = self->_dataBuffer + index;
+    buffer[0] = 0;
+    buffer[1] = 0;
+    buffer[2] = value / 0x100;
+    buffer[3] = value % 0x100;
+}
+
 uint16_t
 SVPublisher_ASDU_getSmpCnt(SVPublisher_ASDU self)
 {
diff --git a/src/sampled_values/sv_publisher.h b/src/sampled_values/sv_publisher.h
index d4acc399..d75f5f5e 100644
--- a/src/sampled_values/sv_publisher.h
+++ b/src/sampled_values/sv_publisher.h
@@ -244,6 +244,27 @@ SVPublisher_ASDU_addTimestamp(SVPublisher_ASDU self);
 void
 SVPublisher_ASDU_setTimestamp(SVPublisher_ASDU self, int index, Timestamp value);
 
+/**
+ * \brief Reserve memory for a quality value in the ASDU
+ *
+ * NOTE: Quality is encoded as BITSTRING (4 byte)
+ *
+ * \param[in] self the Sampled Values ASDU instance.
+ * \return the offset in bytes of the new element within the ASDU data block.
+ */
+int
+SVPublisher_ASDU_addQuality(SVPublisher_ASDU self);
+
+/**
+ * \brief Set the value of a quality attribute in the ASDU.
+ *
+ * \param[in] self the Sampled Values ASDU instance.
+ * \param[in] index The offset within the data block of the ASDU in bytes.
+ * \param[in] value The value which should be set.
+ */
+void
+SVPublisher_ASDU_setQuality(SVPublisher_ASDU self, int index, Quality value);
+
 /**
  * \brief Set the sample count attribute of the ASDU.
  *
diff --git a/src/sampled_values/sv_subscriber.c b/src/sampled_values/sv_subscriber.c
index 251c0497..a895d410 100644
--- a/src/sampled_values/sv_subscriber.c
+++ b/src/sampled_values/sv_subscriber.c
@@ -842,6 +842,19 @@ SVSubscriber_ASDU_getTimestamp(SVSubscriber_ASDU self, int index)
     return retVal;
 }
 
+Quality
+SVSubscriber_ASDU_getQuality(SVSubscriber_ASDU self, int index)
+{
+    Quality retVal;
+
+    uint8_t* buffer = self->dataBuffer + index;
+
+    retVal = buffer[3];
+    retVal += (buffer[2] * 0x100);
+
+    return retVal;
+}
+
 int
 SVSubscriber_ASDU_getDataSize(SVSubscriber_ASDU self)
 {
diff --git a/src/sampled_values/sv_subscriber.h b/src/sampled_values/sv_subscriber.h
index d6ad938d..e3760e99 100644
--- a/src/sampled_values/sv_subscriber.h
+++ b/src/sampled_values/sv_subscriber.h
@@ -74,6 +74,7 @@ typedef struct sEthernetSocket* EthernetSocket;
  *  | TimeStamp      | 8 byte         |
  *  | EntryTime      | 6 byte         |
  *  | BITSTRING      | 4 byte         |
+ *  | Quality        | 4 byte         |
  *
  * The SV subscriber API can be used independent of the IEC 61850 client API. In order to access the SVCB via MMS you
  * have to use the IEC 61850 client API. Please see \ref ClientSVControlBlock object in section \ref IEC61850_CLIENT_SV.
@@ -493,6 +494,19 @@ SVSubscriber_ASDU_getFLOAT64(SVSubscriber_ASDU self, int index);
 Timestamp
 SVSubscriber_ASDU_getTimestamp(SVSubscriber_ASDU self, int index);
 
+/**
+ * \brief Get a quality value in the data part of the ASDU
+ *
+ * NOTE: Quality is encoded as BITSTRING (4 byte)
+ *
+ * \param self ASDU object instance
+ * \param index the index (byte position of the start) of the data in the data part
+ *
+ * \return SV data
+ */
+Quality
+SVSubscriber_ASDU_getQuality(SVSubscriber_ASDU self, int index);
+
 /**
  * \brief Returns the size of the data part of the ASDU
  *
diff --git a/src/vs/libiec61850.def b/src/vs/libiec61850.def
index 6df41f0e..68309da5 100644
--- a/src/vs/libiec61850.def
+++ b/src/vs/libiec61850.def
@@ -701,4 +701,7 @@ EXPORTS
     SVReceiver_isRunning
     SVSubscriber_ASDU_getTimestamp
     SVPublisher_ASDU_addTimestamp
-    SVPublisher_ASDU_setTimestamp
\ No newline at end of file
+    SVPublisher_ASDU_setTimestamp
+    SVSubscriber_ASDU_getQuality
+    SVPublisher_ASDU_addQuality
+    SVPublisher_ASDU_setQuality
\ No newline at end of file