diff --git a/src/types.h b/src/types.h
new file mode 100644
index 0000000..4a041eb
--- /dev/null
+++ b/src/types.h
@@ -0,0 +1,24 @@
+#ifndef _TYPES_H
+#define _TYPES_H
+
+#include "config.h"
+
+#ifndef HAS_TYPES
+typedef unsigned char  int8_t;
+typedef unsigned short int16_t;
+typedef unsigned int   int32_t;
+#endif
+
+typedef int8_t      token_t;
+typedef NUMBER_T    number_t; 
+typedef int16_t     index_t;
+typedef int16_t     address_t;
+typedef int16_t     vm_state_t;
+
+
+#define token_s   sizeof(token_t)
+#define number_s  sizeof(number_t)
+#define index_s   sizeof(index_t)
+#define address_s sizeof(address_t)
+
+#endif