diff --git a/ChangeLog b/ChangeLog
index 699c4bfc..2239355f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -6,6 +6,7 @@
 
 changes since 0.11.0
 ===================================
+NEW 2012-05-22 added spin rotation angle to the LEM MusrRoot file.
 NEW 2012-05-12 added dump_header. This is a little program which dumps the
                header information of a given muSR data file onto the standard
 	       output. Since dump_header also includes the option of
diff --git a/src/classes/PMusr.cpp b/src/classes/PMusr.cpp
index 4fe1810b..d57c5569 100644
--- a/src/classes/PMusr.cpp
+++ b/src/classes/PMusr.cpp
@@ -519,6 +519,7 @@ PRawRunData::PRawRunData()
   fMuonSource = TString("n/a");
   fMuonSpecies = TString("n/a");
   fMuonBeamMomentum = PMUSR_UNDEFINED;
+  fMuonSpinAngle = PMUSR_UNDEFINED;
   fRunName = TString("n/a");
   fRunNumber = -1;
   fRunTitle = TString("n/a");
diff --git a/src/classes/PRunDataHandler.cpp b/src/classes/PRunDataHandler.cpp
index 55f888b3..792dd0d7 100644
--- a/src/classes/PRunDataHandler.cpp
+++ b/src/classes/PRunDataHandler.cpp
@@ -1472,6 +1472,11 @@ Bool_t PRunDataHandler::ReadRootFile()
     if (ok)
       runData.SetMuonSource(str);
 
+    header->Get("RunInfo/Muon Spin Angle", prop, ok);
+    if (ok) {
+      runData.SetMuonSpinAngle(prop.GetValue());
+    }
+
     header->Get("RunInfo/Setup", str, ok);
     if (ok)
       runData.SetSetup(str);
diff --git a/src/dump_header.cpp b/src/dump_header.cpp
index 0f7cab91..b4c89418 100644
--- a/src/dump_header.cpp
+++ b/src/dump_header.cpp
@@ -190,6 +190,7 @@ int dump_header_root(const string fileName, const string fileFormat)
  */
 int dump_header_nexus(const string fileName) {
 
+#ifdef PNEXUS_ENABLED
   PNeXus *nxs_file = new PNeXus(fileName.c_str());
 
   if (nxs_file->IsValid(false)) {
@@ -198,6 +199,9 @@ int dump_header_nexus(const string fileName) {
 
   if (nxs_file)
     delete nxs_file;
+#else
+  cout << endl << "NeXus not enabled, hence the header information cannot be dumped." << endl << endl;
+#endif
 
   return 0;
 }
diff --git a/src/external/MusrRoot/MusrRootLEM.xsd b/src/external/MusrRoot/MusrRootLEM.xsd
index a19822d7..6c3077c8 100644
--- a/src/external/MusrRoot/MusrRootLEM.xsd
+++ b/src/external/MusrRoot/MusrRootLEM.xsd
@@ -125,6 +125,7 @@
       <xs:element name="Moderator_HV" type="TMusrRunPhysicalQuantity"/>
       <xs:element name="Sample_HV" type="TMusrRunPhysicalQuantity"/>
       <xs:element name="Implantation_Energy" type="TMusrRunPhysicalQuantity"/>
+      <xs:element name="Muon_Spin_Angle" type="TMusrRunPhysicalQuantity"/>
       <xs:element name="Cuts" type="TString"/>
       <xs:any processContents="skip" minOccurs="0" maxOccurs="unbounded"/> <!-- here can go any additional stuff you like -->
     </xs:sequence>
diff --git a/src/include/PMusr.h b/src/include/PMusr.h
index 98f91a81..e2e01cf4 100644
--- a/src/include/PMusr.h
+++ b/src/include/PMusr.h
@@ -358,6 +358,7 @@ class PRawRunData {
     virtual const TString* GetMuonSource() { return &fMuonSource; }
     virtual const TString* GetMuonSpecies() { return &fMuonSpecies; }
     virtual const Double_t GetMuonBeamMomentum() { return fMuonBeamMomentum; }
+    virtual const Double_t GetMuonSpinAngle() { return fMuonSpinAngle; }
     virtual const Int_t GetRunNumber() { return fRunNumber; }
     virtual const TString* GetRunTitle() { return &fRunTitle; }
     virtual const TString* GetSetup() { return &fSetup; }
@@ -404,6 +405,7 @@ class PRawRunData {
     virtual void SetMuonSource(const TString &str) { fMuonSource = str; }
     virtual void SetMuonSpecies(const TString &str) { fMuonSpecies = str; }
     virtual void SetMuonBeamMomentum(const Double_t dval) { fMuonBeamMomentum = dval; }
+    virtual void SetMuonSpinAngle(const Double_t dval) { fMuonSpinAngle = dval; }
     virtual void SetRunName(const TString &str) { fRunName = str; }
     virtual void SetRunNumber(const Int_t &val) { fRunNumber = val; }
     virtual void SetRunTitle(const TString str) { fRunTitle = str; }
@@ -444,6 +446,7 @@ class PRawRunData {
     TString fMuonSource;             ///< keeps the type of muon source, e.g. continous surface beam, pulsed beam, low energy muon beam
     TString fMuonSpecies;            ///< positive muon or negative muon
     Double_t fMuonBeamMomentum;      ///< given in MeV/c, for LEM this is the momentum of the secondary beamline and NOT the momentum of the low energy beam
+    Double_t fMuonSpinAngle;         ///< gives the muon spin angle in degrees (reference frame depends on the instrument)
     TString fRunName;                ///< name of the run as found in the msr-file
     Int_t   fRunNumber;              ///< run number
     TString fRunTitle;               ///< run title