diff --git a/src/usr/doc/contrib/sqg b/src/usr/doc/contrib/sqg
index dd06dc1..e102ecf 100755
--- a/src/usr/doc/contrib/sqg
+++ b/src/usr/doc/contrib/sqg
@@ -120,12 +120,19 @@ parse_queuefile_requires () {
 }
 
 build_queuefile () {
-  QUEUEFILE=$QUEUEDIR/$PRGNAM.sqf
+  OLDFILE=$QUEUEDIR/$PRGNAM.sqf
+  QUEUEFILE=$QUEUEDIR/$PRGNAM.sqf.tmp
+  CATFILE=$QUEUEDIR/tmp.sqf
   touch $QUEUEFILE
   echo "$PRGNAM" > $QUEUEFILE
   parse_queuefile_requires $PRGNAM
-  tac $QUEUEFILE > $QUEUEDIR/tmp.sqf
-  mv $QUEUEDIR/tmp.sqf $QUEUEFILE
+  tac $QUEUEFILE > $CATFILE
+  if cmp -s "$CATFILE" "$OLDFILE"; then
+    rm $QUEUEFILE $CATFILE
+  else
+    mv $CATFILE $OLDFILE
+    rm $QUEUEFILE
+  fi
 }
 
 main_loop () {