diff --git a/DMRDataHeader.cpp b/DMRDataHeader.cpp
index 99ac789..bc436c8 100644
--- a/DMRDataHeader.cpp
+++ b/DMRDataHeader.cpp
@@ -102,12 +102,14 @@ bool CDMRDataHeader::put(const unsigned char* bytes)
 
 	case DPF_DEFINED_RAW:
 		CUtils::dump(1U, "Raw or Status/Precoded Short Data Header", m_data, 12U);
+		m_blocks = m_data[0U] & 0x3FU;
 		m_F = (m_data[8U] & 0x01U) == 0x01U;
 		m_S = (m_data[8U] & 0x02U) == 0x02U;
 		break;
 
 	case DPF_DEFINED_SHORT:
 		CUtils::dump(1U, "Defined Short Data Header", m_data, 12U);
+		m_blocks = m_data[0U] & 0x3FU;
 		m_F = (m_data[8U] & 0x01U) == 0x01U;
 		m_S = (m_data[8U] & 0x02U) == 0x02U;
 		break;