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diff --git a/gas/doc/as.texinfo b/gas/doc/as.texinfo
index d1240bf562..3af86f8e2e 100644
--- a/gas/doc/as.texinfo
+++ b/gas/doc/as.texinfo
@@ -6360,6 +6360,11 @@ Mark the symbol as being a common data object.
@itemx notype
Does not mark the symbol in any way. It is supported just for completeness.
+@item gnu_unique_object
+Marks the symbol as being a globally unique data object. The dynamic linker
+will make sure that in the entire process there is just one symbol with this
+name and type in use. (This is only supported on Linux targeted assemblers).
+
@end table
Note: Some targets support extra types in addition to those listed above.