diff --git a/cppad.spec b/cppad.spec
index fd2bee1..e4078d5 100644
--- a/cppad.spec
+++ b/cppad.spec
@@ -13,7 +13,7 @@
 # https://fedoraproject.org/wiki/Packaging:Versioning
 Name: cppad
 Version: %{yyyymmdd}.3
-Release: 2%{?dist}
+Release: 3%{?dist}
 Summary: C++ Algorithmic Differentiation (AD), %{name}-devel and %{name}-doc
 
 License: EPL-2.0 or GPLv2+
@@ -85,8 +85,9 @@ tar -xzf %{_topdir}/SOURCES/%{yyyymmdd}.doc.tar.gz
 mv CppAD-%{yyyymmdd}.doc/doc CppAD-%{version}/doc
 mv CppAD-%{version}/COPYING  COPYING
 mv CppAD-%{version}/uw_copy_040507.html uw_copy_040507.html
-#
-# Patch corresponding to bug fix in unstream source 20210000.4
+# ---------------------------------------------------------------------------
+# Patch corresponding to bug fix in upstream source 20210000.4
+# ---------------------------------------------------------------------------
 cp CppAD-%{version}/include/cppad/core/abs_normal_fun.hpp \
     CppAD-%{version}/include/cppad/core/abs_normal_fun.bak
 for uu in vp pv vv
@@ -97,7 +98,83 @@ do
 done
 sed -i CppAD-%{version}/include/cppad/core/abs_normal_fun.hpp \
     -e 's|^\( *\)case ZmulvvOp:|\1case PowvvOp:\n&|'
+# ---------------------------------------------------------------------------
+# Patch corresponding to fix in upstream source 20210000.5
+# ---------------------------------------------------------------------------
+file="CppAD-%{version}/test_more/general/atomic_three.cpp"
+cat << EOF > junk.sed
+s|f.size_par() == 5;|f.size_par() == 6;|
+s|f.size_par() == 4;|f.size_par() == 5;|
+s|f.size_par() == 2;|f.size_par() == 3;|
+EOF
+sed -i $file -f junk.sed
 #
+file="CppAD-%{version}/test_more/general/new_dynamic.cpp"
+cat << EOF > junk.sed
+s|== num_dyn_ind + 1 + 2;|== num_dyn_ind + 1 + 3;|
+s|== nd + 2 + 2;|== nd + 2 + 3;|
+EOF
+sed -i $file -f junk.sed
+#
+file="CppAD-%{version}/include/cppad/local/optimize/optimize_run.hpp"
+cat << EOF > junk.sed
+/nan with type Base/! b one
+N;N;N
+d
+b end
+#
+: one
+/const size_t num_var/! b two
+s|^|# ifndef NDEBUG\\n|
+s|\$|\\n# endif|
+b end
+#
+: two
+/set new_par for the dependent dynamic parameters/! b three
+s|^|    // index corresponding to the parameter zero\\
+    addr_t zero_par_index = rec->put_con_par( Base(0) );\\n\\n|
+b end
+#
+: three
+/case FunapOp:/! b four
+N;N;N;N;N;N;N
+s|\\n *if.*||
+s|$|\\
+            if( new_arg[0] == addr_t_max )\\
+                new_arg[0] = zero_par_index;\\
+            rec->PutArg(new_arg[0]);|
+b end
+#
+: four
+/if( size_t(new_arg.0.) < num_var )/! b five
+s|if|CPPAD_ASSERT_UNKNOWN|
+s|$|;\\
+            if( new_arg[0] != 0 )|
+b end
+#
+: five
+/new_arg.0. =.*base_nan/! b six
+s|=.*|= zero_par_index;|
+: six
+/case FunrpOp:/! b seven
+N;N;N;N;N;N;N;N;N;N;N;N
+s|\\n *if.*||
+s|$|\\
+            if( new_arg[0] == addr_t_max )\\
+            {   // This parameter is not used here or anywhere.\\
+                CPPAD_ASSERT_UNKNOWN( op_usage[i_op] == usage_t(no_usage) );\\
+                new_arg[0] = zero_par_index;\\
+            }\\
+            rec->PutArg(new_arg[0]);\\
+            //|
+b end
+#
+: seven
+s|rec->PutArg(0);.*|rec->PutArg( zero_par_index );|
+: end
+EOF
+sed -i $file -f junk.sed
+# ----------------------------------------------------------------------------
 # cppad_lib: replace soversion number and ensure build type is release 
 sed -i.bak CppAD-%{version}/cppad_lib/CMakeLists.txt \
     -e "s|print_variable(soversion)|SET(soversion %{soversion} )\n&|" \
@@ -195,6 +272,9 @@ make %{?_smp_mflags} check
 
 # ----------------------------------------------------------------------------
 %changelog
+* Thu Feb 18 2021 Brad Bell <bradbell at seanet dot com> - 20210000.3-3
+- Patch corresponding to bug fix in upstream source 20210000.5
+
 * Tue Feb 02 2021 Brad Bell <bradbell at seanet dot com> - 20210000.3-2
 - Patch corresponding to bug fix in upstream source 20210000.4