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diff --git a/perl_exp.SH b/perl_exp.SH
old mode 100755
new mode 100644
index ef79876..06b587f
--- a/perl_exp.SH
+++ b/perl_exp.SH
@@ -5,9 +5,9 @@
 # Create the export list for perl.
 # Needed by AIX to do dynamic linking.
 #
-# This simple program relys on 'global.sym' being up to date
-# with all of the global symbols that a dynamicly link library
-# might want to access.
+# This simple program relys on 'global.sym' and other *.sym files
+# being up to date with all of the global symbols that a dynamic
+# link library might want to access.
 #
 # Most symbols have a Perl_ prefix because that's what embed.h sticks
 # in front of them.  Variations depend on binary compatibility with
@@ -57,6 +57,15 @@ y*)
 	;;
 esac
 
+# 
+# If we use the PerlIO abstraction layer, add its symbols
+#
+
+if [ $useperlio = "define" ]
+then
+	grep '^[A-Za-z]' perlio.sym >> perl.exp
+fi
+
 #
 # Extra globals not included above (including a few that might
 # not actually be defined, but there's no harm in that).