diff -ur gnucap-2009-02-02.old/modelgen/ap_match.cc gnucap-2009-02-02/modelgen/ap_match.cc
--- gnucap-2009-02-02.old/modelgen/ap_match.cc	2009-07-06 19:13:33.484852215 +0300
+++ gnucap-2009-02-02/modelgen/ap_match.cc	2009-07-06 12:55:54.373761590 +0300
@@ -64,7 +64,7 @@
       }
     }else{
       // mismatch
-      char* bar = strchr(str2, '|');
+      const char* bar = strchr(str2, '|');
       if (bar && (bar[-1] != '\\')) {
 	str2 = bar+1;
 	reset(start);
diff -ur gnucap-2009-02-02.old/src/ap_match.cc gnucap-2009-02-02/src/ap_match.cc
--- gnucap-2009-02-02.old/src/ap_match.cc	2009-07-06 19:13:13.153147442 +0300
+++ gnucap-2009-02-02/src/ap_match.cc	2009-07-06 12:55:54.373761590 +0300
@@ -64,7 +64,7 @@
       }
     }else{
       // mismatch
-      char* bar = strchr(str2, '|');
+      const char* bar = strchr(str2, '|');
       if (bar && (bar[-1] != '\\')) {
 	str2 = bar+1;
 	reset(start);