diff --git a/Configure b/Configure
index dacccc0e75..534a92d713 100755
--- a/Configure
+++ b/Configure
@@ -564,6 +564,9 @@ my %table=(
 "vxworks-ppc750","ccppc:-ansi -nostdinc -DPPC750 -D_REENTRANT -fvolatile -fno-builtin -fno-for-scope -fsigned-char -Wall -msoft-float -mlongcall -DCPU=PPC604 -I\$(WIND_BASE)/target/h \$(DEBUG_FLAG):::VXWORKS:-r:::::",
 "vxworks-ppc750-debug","ccppc:-ansi -nostdinc -DPPC750 -D_REENTRANT -fvolatile -fno-builtin -fno-for-scope -fsigned-char -Wall -msoft-float -mlongcall -DCPU=PPC604 -I\$(WIND_BASE)/target/h -DBN_DEBUG -DREF_CHECK -DCONF_DEBUG -DBN_CTX_DEBUG -DCRYPTO_MDEBUG -DPEDANTIC -DDEBUG_SAFESTACK -DDEBUG -g:::VXWORKS:-r:::::",
 
+##### Compaq Non-Stop Kernel (Tandem)
+"tandem-c89","c89:-Ww -D__TANDEM -D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED=1 -D_TANDEM_SOURCE -DB_ENDIAN::(unknown):::THIRTY_TWO_BIT:::",
+
 );
 
 my @WinTargets=qw(VC-NT VC-WIN32 VC-WIN16 VC-W31-16 VC-W31-32 VC-MSDOS BC-32
diff --git a/config b/config
index 87e7f87094..a253221285 100755
--- a/config
+++ b/config
@@ -351,6 +351,10 @@ case "${SYSTEM}:${RELEASE}:${VERSION}:${MACHINE}" in
     *CRAY*)
        echo "j90-cray-unicos"; exit 0;
        ;;
+
+    NONSTOP_KERNEL*)
+       echo "nsr-tandem-nsk"; exit 0;
+       ;;
 esac
 
 #
@@ -725,6 +729,7 @@ EOF
   *-*-cygwin) OUT="Cygwin" ;;
   t3e-cray-unicosmk) OUT="cray-t3e" ;;
   j90-cray-unicos) OUT="cray-j90" ;;
+  nsr-tandem-nsk) OUT="tandem-c89" ;;
   *) OUT=`echo $GUESSOS | awk -F- '{print $3}'`;;
 esac