diff --git a/compile.c b/compile.c
index 4ee9251..12ae8fa 100644
--- a/compile.c
+++ b/compile.c
@@ -506,14 +506,19 @@ static const char *preamble= "\
 #ifndef YY_BUFFER_START_SIZE\n\
 #define YY_BUFFER_START_SIZE 1024\n\
 #endif\n\
+#ifndef YY_TEXT_START_SIZE\n\
+#define YY_TEXT_START_SIZE 1024\n\
+#endif\n\
 \n\
 #ifndef YY_PART\n\
 #define yydata G->data\n\
+#define yybuf G->buf\n\
+#define yycapture (*thunk)\n\
 #define yy G->ss\n\
 \n\
 struct _yythunk; /* forward declaration */\n\
 typedef void (*yyaction)(struct _GREG *G, char *yytext, int yyleng, struct _yythunk *thunkpos, YY_XTYPE YY_XVAR);\n\
-typedef struct _yythunk { int begin, end;  yyaction  action; const char *name; struct _yythunk *next; } yythunk;\n\
+typedef struct _yythunk { int begin, end;  yyaction  action; const char *name; } yythunk;\n\
 \n\
 typedef struct _GREG {\n\
   char *buf;\n\
@@ -648,7 +653,7 @@ YY_LOCAL(int) yyText(GREG *G, int begin, int end)\n\
   int yyleng= end - begin;\n\
   if (yyleng <= 0)\n\
     yyleng= 0;\n\
-  else\n\
+  else if (G->text)\n\
     {\n\
       while (G->textlen < (yyleng + 1))\n\
         {\n\
@@ -657,7 +662,7 @@ YY_LOCAL(int) yyText(GREG *G, int begin, int end)\n\
         }\n\
       memcpy(G->text, G->buf + begin, yyleng);\n\
     }\n\
-  G->text[yyleng]= '\\0';\n\
+  if (G->text) G->text[yyleng]= '\\0';\n\
   return yyleng;\n\
 }\n\
 \n\
@@ -736,8 +741,8 @@ YY_PARSE(int) YY_NAME(parse_from)(GREG *G, yyrule yystart)\n\
     {\n\
       G->buflen= YY_BUFFER_START_SIZE;\n\
       G->buf= (char*)YY_ALLOC(G->buflen, G->data);\n\
-      G->textlen= YY_BUFFER_START_SIZE;\n\
-      G->text= (char*)YY_ALLOC(G->textlen, G->data);\n\
+      G->textlen= YY_TEXT_START_SIZE;\n\
+      G->text= (char*)(G->textlen ? YY_ALLOC(G->textlen, G->data) : 0);\n\
       G->thunkslen= YY_STACK_SIZE;\n\
       G->thunks= (yythunk*)YY_ALLOC(sizeof(yythunk) * G->thunkslen, G->data);\n\
       G->valslen= YY_STACK_SIZE;\n\