1 files changed, 5 insertions, 0 deletions
diff --git a/pc.h b/pc.h
index 009e3ff..7a8be68 100644
--- a/pc.h
+++ b/pc.h
@@ -1,5 +1,10 @@
+#ifndef PC_H
+#define PC_H
 char* pretty_type(int);
 
 void debug_print(int, union YYSTYPE*);
 
 int yyerror(char*);
+#endif
+
+#define DEBUG