diff --git a/src/c/symbols_list.h b/src/c/symbols_list.h
index 3ae61f646..31fb6ba51 100755
--- a/src/c/symbols_list.h
+++ b/src/c/symbols_list.h
@@ -1147,7 +1147,7 @@ cl_symbols[] = {
 {SYS_ "FILE-COLUMN", SI_ORDINARY, si_file_column, 1, OBJNULL},
 {EXT_ "FILE-KIND", EXT_ORDINARY, si_file_kind, 2, OBJNULL},
 {SYS_ "FILL-POINTER-SET", SI_ORDINARY, si_fill_pointer_set, 2, OBJNULL},
-{SYS_ "FILE-STREAM-FD", SI_ORDINARY, si_file_stream_fd, 1, OBJNULL},
+{EXT_ "FILE-STREAM-FD", EXT_ORDINARY, si_file_stream_fd, 1, OBJNULL},
 {EXT_ "FIXNUMP", EXT_ORDINARY, si_fixnump, 1, OBJNULL},
 {SYS_ "FORMAT-ERROR", SI_ORDINARY, NULL, -1, OBJNULL},
 #ifdef ECL_CMU_FORMAT
diff --git a/src/c/symbols_list2.h b/src/c/symbols_list2.h
index ec3ee9dde..778c9278d 100644
--- a/src/c/symbols_list2.h
+++ b/src/c/symbols_list2.h
@@ -1147,7 +1147,7 @@ cl_symbols[] = {
 {SYS_ "FILE-COLUMN","si_file_column"},
 {EXT_ "FILE-KIND","si_file_kind"},
 {SYS_ "FILL-POINTER-SET","si_fill_pointer_set"},
-{SYS_ "FILE-STREAM-FD","si_file_stream_fd"},
+{EXT_ "FILE-STREAM-FD","si_file_stream_fd"},
 {EXT_ "FIXNUMP","si_fixnump"},
 {SYS_ "FORMAT-ERROR",NULL},
 #ifdef ECL_CMU_FORMAT