diff --git a/defines.h b/defines.h
new file mode 100644
index 0000000..694f74c
--- /dev/null
+++ b/defines.h
@@ -0,0 +1,9 @@
+#ifndef _BRMBAR_DEFINES_H_
+#define _BRMBAR_DEFINES_H_
+
+#define EAN_MAXLEN 32
+#define NAME_MAXLEN 128
+#define ITEM_MAXNUM 128
+
+#endif
+