1 files changed, 3 insertions, 0 deletions

diff --git a/configure1.in b/configure1.in
index ce74228d53e..d94452faa56 100755
--- a/configure1.in
+++ b/configure1.in
@@ -1039,6 +1039,9 @@ if [ x"${opsys}" = x ]; then
     *-sysv2.2 | *-sysvr2.2 )            opsys=usg5-2-2 ;;
     *-sysv3 | *-sysvr3 )                opsys=usg5-3 ;;
     *-sysv4 | *-sysvr4 )                opsys=usg5-4 ;;
+    *-sysv4.1 | *-sysvr4.1 )
+        NON_GNU_CPP=/usr/lib/cpp
+        opsys=usg5-4 ;;
     *-sysv4.2 | *-sysvr4.2 )            opsys=usg5-4-2 ;;
     * )
       unported=true