diff --git a/books/bookvol10.4.pamphlet b/books/bookvol10.4.pamphlet
index a485cc4..4f39b17 100644
--- a/books/bookvol10.4.pamphlet
+++ b/books/bookvol10.4.pamphlet
@@ -60455,7 +60455,7 @@ MPolyCatRationalFunctionFactorizer(E,OV,R,PRF) : C == T
        ground? f => pushuconst(retract f,x)
        v:=mainVariable(f)::OV
        g:=univariate(f,v)
-       multivariate(map(pushup(#1,x),g),v)
+       multivariate(map((y:PRF):PRF +-> pushup(y,x),g),v)
 
       ----  push x back from the coefficient domain ----
      pushuconst(r:F,x:OV):PRF ==
diff --git a/changelog b/changelog
index e49fab2..49a6f6e 100644
--- a/changelog
+++ b/changelog
@@ -1,3 +1,5 @@
+20090608 tpd src/axiom-website/patches.html 20090608.06.tpd.patch
+20090608 tpd books/bookvol10.4 MPRFF +-> conversion
 20090608 tpd src/axiom-website/patches.html 20090608.05.tpd.patch
 20090608 tpd books/bookvol10.4 MHROWRED +-> conversion
 20090608 tpd src/axiom-website/patches.html 20090608.04.tpd.patch
diff --git a/src/axiom-website/patches.html b/src/axiom-website/patches.html
index 5ac69d2..291ff78 100644
--- a/src/axiom-website/patches.html
+++ b/src/axiom-website/patches.html
@@ -1505,5 +1505,7 @@ tpieazas002.input CATS test added<br/>
 bookvol10.4 MDDFACT +-> conversion<br/>
 <a href="patches/20090608.05.tpd.patch">20090608.05.tpd.patch</a>
 bookvol10.4 MHROWRED +-> conversion<br/>
+<a href="patches/20090608.06.tpd.patch">20090608.06.tpd.patch</a>
+bookvol10.4 MPRFF +-> conversion<br/>
  </body>
 </html>