diff -uNr XML-Sablotron-1.01/Processor/Processor.h XML-Sablotron-1.01p/Processor/Processor.h
--- XML-Sablotron-1.01/Processor/Processor.h	2004-06-04 16:20:40.000000000 +0300
+++ XML-Sablotron-1.01p/Processor/Processor.h	2011-06-13 00:29:00.070851996 +0300
@@ -119,7 +119,7 @@
     if (processor_obj) 
       XPUSHs(processor_obj);
     else
-      XPUSHs(&sv_undef);
+      XPUSHs(&PL_sv_undef);
     XPUSHs(sv_2mortal(newSViv(severity)));
     XPUSHs(sv_2mortal(newSViv(facility)));
     XPUSHs(sv_2mortal(newSViv(code)));
@@ -167,7 +167,7 @@
     if (processor_obj) 
       XPUSHs(processor_obj);
     else
-      XPUSHs(&sv_undef);
+      XPUSHs(&PL_sv_undef);
     XPUSHs(sv_2mortal(newSViv(code)));
     XPUSHs(sv_2mortal(newSViv(level)));
     foo = fields;
@@ -215,7 +215,7 @@
     if (processor_obj) 
       XPUSHs(processor_obj);
     else
-      XPUSHs(&sv_undef);
+      XPUSHs(&PL_sv_undef);
     XPUSHs(sv_2mortal(newSViv(code)));
     XPUSHs(sv_2mortal(newSViv(level)));
     foo = fields;
@@ -270,7 +270,7 @@
     if (processor_obj) 
       XPUSHs(processor_obj);
     else
-      XPUSHs(&sv_undef);
+      XPUSHs(&PL_sv_undef);
     XPUSHs(sv_2mortal(newSVpv((char*) scheme, strlen(scheme))));
     XPUSHs(sv_2mortal(newSVpv((char*) rest, strlen(rest))));
 
@@ -337,7 +337,7 @@
     if (processor_obj) 
       XPUSHs(processor_obj);
     else
-      XPUSHs(&sv_undef);
+      XPUSHs(&PL_sv_undef);
     XPUSHs(sv_2mortal(newSVpv((char*) scheme, strlen(scheme))));
     XPUSHs(sv_2mortal(newSVpv((char*) rest, strlen(rest))));
 
@@ -395,7 +395,7 @@
     if (processor_obj) 
       XPUSHs(processor_obj);
     else
-      XPUSHs(&sv_undef);
+      XPUSHs(&PL_sv_undef);
     XPUSHs((SV*)handle);
     XPUSHs(sv_2mortal(newSViv(*byteCount)));
     PUTBACK;
@@ -453,7 +453,7 @@
     if (processor_obj) 
       XPUSHs(processor_obj);
     else
-      XPUSHs(&sv_undef);
+      XPUSHs(&PL_sv_undef);
     XPUSHs((SV*) handle);
     XPUSHs(sv_2mortal(newSVpv((char*) buffer, *byteCount)));
     PUTBACK;
@@ -506,7 +506,7 @@
     if (processor_obj) 
       XPUSHs(processor_obj);
     else
-      XPUSHs(&sv_undef);
+      XPUSHs(&PL_sv_undef);
     XPUSHs((SV*) handle);
 
     PUTBACK;
@@ -553,7 +553,7 @@
         if (processor_obj) 
             XPUSHs(processor_obj);
         else
-            XPUSHs(&sv_undef);
+            XPUSHs(&PL_sv_undef);
 
         PUTBACK;
         
@@ -593,7 +593,7 @@
         if (processor_obj) 
             XPUSHs(processor_obj);
         else
-            XPUSHs(&sv_undef);
+            XPUSHs(&PL_sv_undef);
 
         XPUSHs(sv_2mortal(newSVpv((char*) name, strlen(name))));
         att = (char**)atts;
@@ -639,7 +639,7 @@
         if (processor_obj) 
             XPUSHs(processor_obj);
         else
-            XPUSHs(&sv_undef);
+            XPUSHs(&PL_sv_undef);
 
         XPUSHs(sv_2mortal(newSVpv((char*) name, strlen(name))));
 
@@ -680,7 +680,7 @@
         if (processor_obj) 
             XPUSHs(processor_obj);
         else
-            XPUSHs(&sv_undef);
+            XPUSHs(&PL_sv_undef);
 
         XPUSHs(sv_2mortal(newSVpv((char*) prefix, strlen(prefix))));
         XPUSHs(sv_2mortal(newSVpv((char*) uri, strlen(uri))));
@@ -722,7 +722,7 @@
         if (processor_obj) 
             XPUSHs(processor_obj);
         else
-            XPUSHs(&sv_undef);
+            XPUSHs(&PL_sv_undef);
 
         XPUSHs(sv_2mortal(newSVpv((char*) prefix, strlen(prefix))));
 
@@ -763,7 +763,7 @@
         if (processor_obj) 
             XPUSHs(processor_obj);
         else
-            XPUSHs(&sv_undef);
+            XPUSHs(&PL_sv_undef);
 
         XPUSHs(sv_2mortal(newSVpv((char*) contents, strlen(contents))));
 
@@ -804,7 +804,7 @@
         if (processor_obj) 
             XPUSHs(processor_obj);
         else
-            XPUSHs(&sv_undef);
+            XPUSHs(&PL_sv_undef);
 
         XPUSHs(sv_2mortal(newSVpv((char*) target, strlen(target))));
         XPUSHs(sv_2mortal(newSVpv((char*) contents, strlen(contents))));
@@ -846,7 +846,7 @@
         if (processor_obj) 
             XPUSHs(processor_obj);
         else
-            XPUSHs(&sv_undef);
+            XPUSHs(&PL_sv_undef);
 
         XPUSHs(sv_2mortal(newSVpv((char*) contents, length)));
 
@@ -886,7 +886,7 @@
         if (processor_obj) 
             XPUSHs(processor_obj);
         else
-            XPUSHs(&sv_undef);
+            XPUSHs(&PL_sv_undef);
 
         PUTBACK;
         
@@ -931,7 +931,7 @@
     if (processor_obj) 
       XPUSHs(processor_obj);
     else
-      XPUSHs(&sv_undef);
+      XPUSHs(&PL_sv_undef);
     XPUSHs(sv_2mortal(newSVpv((char*) contentType, strlen(contentType))));
     XPUSHs(sv_2mortal(newSVpv((char*) encoding, strlen(encoding))));