diff --git a/src/fslio/dbh.h b/src/fslio/dbh.h
index eff0a50a..fbce1770 100644
--- a/src/fslio/dbh.h
+++ b/src/fslio/dbh.h
@@ -79,19 +79,6 @@ struct dsr                              /*      dsr              */
         struct data_history hist;               /* 148 + 200 */
     };                                          /* total=348 */
         
-/* Acceptable values for hdr.dime.datatype */
-
-#define DT_NONE                         0
-#define DT_UNKNOWN                      0
-#define DT_BINARY                       1
-#define DT_UNSIGNED_CHAR                2
-#define DT_SIGNED_SHORT                 4
-#define DT_SIGNED_INT                   8
-#define DT_FLOAT                        16
-#define DT_COMPLEX                      32
-#define DT_DOUBLE                       64
-#define DT_RGB                          128
-#define DT_ALL                          255
 
 typedef struct 
         {