diff --git a/writecntriffdata.m b/writecntriffdata.m
index d2c1ca0..8b1221a 100644
--- a/writecntriffdata.m
+++ b/writecntriffdata.m
@@ -1,6 +1,11 @@
 % $Id$
 
-function epochOffsetArray = writeriffdata(fid, data, epochLength)
+function epochOffsetArray = writecntriffdata(fid, data, epochLength, compMeth)
+
+% Compression method
+if nargin < 4 || isempty(compMeth)
+    compMeth = 12; % Float vectors
+end
 
 % Epoch length
 if nargin < 3
@@ -19,14 +24,28 @@
     epochOffsetArray(iEpoch) = ftell(fid) - chunkOffset;
 
     for iChan = 1:size(data, 1)
+        
+        switch compMeth
+
+            % Uncompressed 32 bit integer
+            case 8
+                % Write data format and compression information
+                fwrite(fid, 128, 'uint8');
+
+                % Write data
+                fwrite(fid, data(iChan, epochArray(iEpoch) + 1:epochArray(iEpoch + 1)), 'int32', 'b'); % Big endian!
+
+            % EEP 4.0 average (float vectors)
+            case 12
+                % Write data format and compression information
+                fwrite(fid, 12, 'uint8');
 
-        % Write data format and compression information (currently
-        % only 32 bit float w/o compression)
-        fwrite(fid, 12, 'ubit4');
-        fwrite(fid, 0, 'ubit4');
+                % Write data
+                fwrite(fid, data(iChan, epochArray(iEpoch) + 1:epochArray(iEpoch + 1)), 'float32');
 
-        % Write data
-        fwrite(fid, data(iChan, epochArray(iEpoch) + 1:epochArray(iEpoch + 1)), 'float32');
+            otherwise
+                error('Unkown compression method.')
+        end
 
     end