diff --git a/third_party/lcms2-2.6/src/cmstypes.c b/third_party/lcms2-2.6/src/cmstypes.c
index 15199c7..6f335d9 100644
--- a/third_party/lcms2-2.6/src/cmstypes.c
+++ b/third_party/lcms2-2.6/src/cmstypes.c
@@ -4225,7 +4225,7 @@ void *Type_MPEmatrix_Read(struct _cms_typehandler_struct* self, cmsIOHANDLER* io
     }
 
 
-    mpe = cmsStageAllocMatrix(self ->ContextID, OutputChans, InputChans, Matrix, Offsets);
+    mpe = cmsStageAllocMatrix(self ->ContextID, InputChans, OutputChans, Matrix, Offsets);
     _cmsFree(self ->ContextID, Matrix);
     _cmsFree(self ->ContextID, Offsets);