Index: mttroot/mtt/bin/trans/m/mtt_check_sigs.m
==================================================================
--- mttroot/mtt/bin/trans/m/mtt_check_sigs.m
+++ mttroot/mtt/bin/trans/m/mtt_check_sigs.m
@@ -9,11 +9,11 @@
 
   M=3;
 
   ## Sanity check
   [N_out,M_out] = size(outsig);
-  if N_out<>1
+  if N_out!=1
     error("There must be exactly one outbond");
   endif
   [N_in,M_in] = size(insigs);
   if (M_out!=M)||(M_in!=M)
     error(sprintf("There must be exactly %i elements to a bond (number, causality, port)",M));