diff --git a/books/bookvol10.4.pamphlet b/books/bookvol10.4.pamphlet
index 8bc3344..d995ac6 100644
--- a/books/bookvol10.4.pamphlet
+++ b/books/bookvol10.4.pamphlet
@@ -117783,7 +117783,7 @@ ODETools(F, LODO): Exports == Implementation where
       m:M := zero(q, #v)
       for i in minRowIndex m .. maxRowIndex m repeat
         setRow_!(m, i, v)
-        v := map_!(diff #1, v)
+        v := map_!((f1:F):F +-> diff f1, v)
       m
 
     variationOfParameters(op, g, b) ==
diff --git a/changelog b/changelog
index 22d0840..c92f949 100644
--- a/changelog
+++ b/changelog
@@ -1,3 +1,5 @@
+20090609 tpd src/axiom-website/patches.html 20090609.04.tpd.patch
+20090609 tpd books/bookvol10.4 ODETOOLS +-> conversion
 20090609 tpd src/axiom-website/patches.html 20090609.03.tpd.patch
 20090609 tpd books/bookvol10.4 ODEINT +-> conversion
 20090609 tpd src/axiom-website/patches.html 20090609.02.tpd.patch
diff --git a/src/axiom-website/patches.html b/src/axiom-website/patches.html
index 2d53f3b..2327627 100644
--- a/src/axiom-website/patches.html
+++ b/src/axiom-website/patches.html
@@ -1519,5 +1519,7 @@ bookvol10.4 NPCOEF +-> conversion<br/>
 bookvol10.4 NUMFMT +-> conversion<br/>
 <a href="patches/20090609.03.tpd.patch">20090609.03.tpd.patch</a>
 bookvol10.4 ODEINT +-> conversion<br/>
+<a href="patches/20090609.04.tpd.patch">20090609.04.tpd.patch</a>
+bookvol10.4 ODETOOLS +-> conversion<br/>
  </body>
 </html>