diff --git a/src/mkhdr b/src/mkhdr
index 9229e92f..e63c1f06 100644
--- a/src/mkhdr
+++ b/src/mkhdr
@@ -1,5 +1,6 @@
 SYSNAME=`uname`
 OBJTYPE=`uname -m | sed 's;i.86;386;; s;/.*;;; s; ;;g' | sed 's/ppc64/power/g' | sed 's/ppc/power/g'`
+SYSVERSION=`uname -r`
 
 BIN=$PLAN9/bin
 LIBDIR=$PLAN9/lib