Added \platform annotations.
diff --git a/Doc/lib/libfm.tex b/Doc/lib/libfm.tex
index f6a4ef4..765a4d8 100644
--- a/Doc/lib/libfm.tex
+++ b/Doc/lib/libfm.tex
@@ -2,6 +2,7 @@
          \emph{Font Manager} interface}
 
 \declaremodule{builtin}{fm}
+  \platform{IRIX}
 \modulesynopsis{\emph{Font Manager} interface for SGI workstations.}