diff --git a/stratus1/src/stratus/st_const.py b/stratus1/src/stratus/st_const.py
index 27ddeb01..7f657bce 100644
--- a/stratus1/src/stratus/st_const.py
+++ b/stratus1/src/stratus/st_const.py
@@ -194,7 +194,8 @@ class Constant ( Model ) :
     if (nbint < 0):
         string = '1' + bin(nbint & (2**(nbit+1)-1))[2:]
     else:
-        string = '0' + bin(nbint)[2:]
+        tmp = bin(nbint)[2:]
+        string = '0'*(nbit - len(tmp)) + tmp
 
     return string
     
diff --git a/stratus1/src/stratus/st_net.py b/stratus1/src/stratus/st_net.py
index 71d6e949..a292e178 100644
--- a/stratus1/src/stratus/st_net.py
+++ b/stratus1/src/stratus/st_net.py
@@ -180,7 +180,7 @@ class net :
                   }
       else :
         inst_name = Constant.getModelName ( constParam )
-        map_cst = { 'output0': cell._TAB_NETS_OUT[num_net]
+        map_cst = { 'o': cell._TAB_NETS_OUT[num_net]
                   , 'vdd': cell._st_vdds[0]
                   , 'vss': cell._st_vsss[0]
                   }