--- a/src/nucleus/nucleus.h	Mon Jul 16 05:19:45 2018 +0000
+++ b/src/nucleus/nucleus.h	Mon Jul 16 06:17:38 2018 +0000
@@ -135,19 +135,25 @@
 typedef int                     INT;
 typedef unsigned long *         UNSIGNED_PTR;
 typedef unsigned char *         BYTE_PTR;
-typedef DATA_ELEMENT            BOOLEAN;
 typedef unsigned int            UNSIGNED_INT;
 
 #define VOID void
 #define HUGE
 #define FAR
 
-typedef char    INT8;  
-typedef unsigned char  UINT8; 
-typedef signed short   INT16; 
-typedef unsigned short UINT16;
-typedef signed long    INT32; 
-typedef unsigned long  UINT32;
+/*
+ * If general.h file has been already included, then
+ * do not define the following types
+ */
+#ifndef GENERAL_H
+typedef DATA_ELEMENT            BOOLEAN;
+typedef signed char             INT8;
+typedef unsigned char           UINT8;
+typedef short                   INT16;
+typedef unsigned short          UINT16;
+typedef int                     INT32;
+typedef unsigned long           UINT32;
+#endif
 
 
 /* Define register defines.  R1, R2, R3, and R4 are used in the Nucleus PLUS