diff --git a/src/Makefile b/src/Makefile
index baa6e28a..b8b5b365 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -13,8 +13,8 @@
 BOOST 		= ../../..
 
 CXX		= g++ -ftemplate-depth-50
-LEX		= flex
-YACC		= bison
+LEX		= flex -L
+YACC		= bison -l
 MV		= /bin/mv
 
 EXTRAFLAGS 	= -g 
diff --git a/src/graphviz_digraph_parser.cpp b/src/graphviz_digraph_parser.cpp
index e421f75e..72ce4cbf 100644
--- a/src/graphviz_digraph_parser.cpp
+++ b/src/graphviz_digraph_parser.cpp
@@ -63,6 +63,8 @@
 #include <sstream>
 #endif
 
+using namespace std;
+
 #ifndef GRAPHVIZ_DIRECTED
 #error Need to define the GRAPHVIZ_DIRECTED macro to either 0 or 1
 #endif 
@@ -425,8 +427,6 @@ static const short yycheck[] = {    36,
 };
 #define YYPURE 1
 
-/* -*-C-*-  Note some compilers choke on comments on `#line' lines.  */
-#line 3 "/usr/share/bison.simple"
 /* This file comes from bison-1.28.  */
 
 /* Skeleton output parser for bison,
@@ -640,7 +640,6 @@ __yy_memcpy (char *to, char *from, unsigned int count)
 #endif
 #endif
 
-#line 217 "/usr/share/bison.simple"
 
 /* The user can define YYPARSE_PARAM as the name of an argument to be passed
    into yyparse.  The argument should have type void *.
@@ -1227,7 +1226,6 @@ case 48:
     break;}
 }
    /* the action file gets copied in in place of this dollarsign */
-#line 543 "/usr/share/bison.simple"
 
   yyvsp -= yylen;
   yyssp -= yylen;
diff --git a/src/graphviz_graph_parser.cpp b/src/graphviz_graph_parser.cpp
index 6878c662..65fd2a40 100644
--- a/src/graphviz_graph_parser.cpp
+++ b/src/graphviz_graph_parser.cpp
@@ -63,6 +63,8 @@
 #include <sstream>
 #endif
 
+using namespace std;
+
 #ifndef GRAPHVIZ_DIRECTED
 #error Need to define the GRAPHVIZ_DIRECTED macro to either 0 or 1
 #endif 
@@ -425,8 +427,6 @@ static const short yycheck[] = {    36,
 };
 #define YYPURE 1
 
-/* -*-C-*-  Note some compilers choke on comments on `#line' lines.  */
-#line 3 "/usr/share/bison.simple"
 /* This file comes from bison-1.28.  */
 
 /* Skeleton output parser for bison,
@@ -640,7 +640,6 @@ __yy_memcpy (char *to, char *from, unsigned int count)
 #endif
 #endif
 
-#line 217 "/usr/share/bison.simple"
 
 /* The user can define YYPARSE_PARAM as the name of an argument to be passed
    into yyparse.  The argument should have type void *.
@@ -1227,7 +1226,6 @@ case 48:
     break;}
 }
    /* the action file gets copied in in place of this dollarsign */
-#line 543 "/usr/share/bison.simple"
 
   yyvsp -= yylen;
   yyssp -= yylen;