diff --git a/include/cc65.h b/include/cc65.h
index 99a8665c8..95de8e4ab 100644
--- a/include/cc65.h
+++ b/include/cc65.h
@@ -36,12 +36,13 @@
 #ifndef _CC65_H
 #define _CC65_H
 
-typedef enum {
-    CC65_EXIT_SUCCESS,
-    CC65_EXIT_FAILURE,
-    CC65_EXIT_AFAILED,
-    CC65_EXIT_ABORT
-} cc65_exit_codes_t;
+
+/* Those cc65 exit constants definitions are in addition the the 
+   constants defined in stdlib.h. The values 0 and 1 are still 
+   reserved for EXIT_SUCCESS and EXIT_FAILURE and should not be
+   redefined */ 
+#define CC65_EXIT_AFAILED 2
+#define CC65_EXIT_ABORT 3
 
 
 /*****************************************************************************/
diff --git a/libsrc/dbg/dbg.c b/libsrc/dbg/dbg.c
index a58e6c7a6..a6f952f35 100644
--- a/libsrc/dbg/dbg.c
+++ b/libsrc/dbg/dbg.c
@@ -14,7 +14,6 @@
 #include <ctype.h>
 #include <6502.h>
 #include <dbg.h>
-#include <cc65.h>
 
 
 /*****************************************************************************/
@@ -1583,7 +1582,7 @@ void DbgEntry (void)
                 
                 /* Exit intentionally with error because one may
                    say that DbgEntry is always abnormal. */
-                exit (CC65_EXIT_FAILURE);
+                exit (EXIT_FAILURE);
         
         }
     }
diff --git a/libsrc/geos-apple/targetutil/convert.c b/libsrc/geos-apple/targetutil/convert.c
index a4d07ac0a..7798e004d 100644
--- a/libsrc/geos-apple/targetutil/convert.c
+++ b/libsrc/geos-apple/targetutil/convert.c
@@ -70,7 +70,7 @@ static void err_exit(char *operation, unsigned char oserr)
                 operation);
     }
     getchar();
-    exit(CC65_EXIT_FAILURE);
+    exit(EXIT_FAILURE);
 }
 
 
@@ -343,5 +343,5 @@ int main(int argc, char* argv[])
     printf("Convert to '%.*s' successful", dir_entry->storage_length.name_length,
                                            dir_entry->file_name);
     getchar();
-    return CC65_EXIT_SUCCESS;
+    return EXIT_SUCCESS;
 }