--- lcms-1.19-orig/src/cmslut.c	2009-10-30 16:57:45.000000000 +0100
+++ lcms-1.19.dfsg/src/cmslut.c	2011-10-05 17:37:28.195676346 +0200
@@ -509,6 +509,9 @@
 
        if (Lut -> wFlags & LUT_HAS3DGRID) {
 
+           if (!Lut->CLut16params.Interp3D)
+               cmsAlloc3DGrid(Lut, 33, Lut->InputChan, Lut->OutputChan);
+
             Lut ->CLut16params.Interp3D(StageABC, StageLMN, Lut -> T, &Lut -> CLut16params);
 
        }