diff --git a/compiler/src/main.h b/compiler/src/main.h
new file mode 100644
index 0000000..b26142c
--- /dev/null
+++ b/compiler/src/main.h
@@ -0,0 +1,19 @@
+#ifndef T_MAIN_H
+#define T_MAIN_H
+
+/** Defined in the flex library */
+extern int   yylex(void);
+extern int   yyparse(void);
+
+/** Expected to be defined by Flex/Bison */
+extern void  yyerror(char* fmt, ...);
+
+/** Parse debug output */
+extern void  pdebug(char* fmt, ...);
+
+/** Flex utilities */
+extern int   yylineno;
+extern char  yytext[];
+extern FILE* yyin;
+
+#endif