diff --git a/cppad.spec b/cppad.spec
index f4059f2..5fadadd 100644
--- a/cppad.spec
+++ b/cppad.spec
@@ -139,12 +139,16 @@ cat << EOF > to_string.patch
 71a93,94
 >         if( std::numeric_limits<Integer>::min() != 0 )
 >             std::cout << "unsigned_integer: min != 0\n";
-83a107,108
+83a107,110
 >         if( ! ok )
+>         {   std::cout << "check/pi - 1.0 = " << check/pi - 1.0 << "\n";
 >             print_error("floating", "pi", pi, check, eps);
-100a126,127
+>         }
+100a128,131
 >         if( ! ok )
+>         {   std::cout << "check/pi - 1.0 = " << check/pi - Base(1.0) << "\n";
 >             print_error("ad_floating", "pi", pi, check, eps);
+>         }
 EOF
 patch CppAD-%{version}/example/utility/to_string.cpp to_string.patch
 # -----------------------------------------------------------------------------
@@ -235,6 +239,9 @@ make %{?_smp_mflags} check
 # This enables one to check that the necessary files are installed.
 # ----------------------------------------------------------------------------
 %changelog
+* Tue Feb 01 2022  Brad Bell <bradbell at seanet dot com> - 20220000.1-1
+- Modify to_string.cpp patch to print out more information on failure.
+
 * Mon Jan 31 2022  Brad Bell <bradbell at seanet dot com> - 20220000.1-1
 - Fix following long standing typos in cmake command:
 - 1. cppad_test_vector -> cppad_testvector