diff --git a/include/cppad/core/base_complex.hpp b/include/cppad/core/base_complex.hpp
index 082c48609..9acad46ef 100644
--- a/include/cppad/core/base_complex.hpp
+++ b/include/cppad/core/base_complex.hpp
@@ -2,7 +2,7 @@
 # define CPPAD_CORE_BASE_COMPLEX_HPP
 // SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
 // SPDX-FileCopyrightText: Bradley M. Bell <bradbell@seanet.com>
-// SPDX-FileContributor: 2003-23 Bradley M. Bell
+// SPDX-FileContributor: 2003-24 Bradley M. Bell
 // ----------------------------------------------------------------------------
 # include <cppad/configure.hpp>
 # include <limits>
@@ -12,7 +12,7 @@
 {xrst_begin base_complex.hpp}
 {xrst_spell
    complier
-   invocations
+   ge
    isnan
 }
 
@@ -44,13 +44,28 @@ in addition to including
 
 CondExpOp
 *********
-The type ``std::complex<double>`` does not supports the
-``<`` , ``<=`` , ``==`` , ``>=`` , and ``>`` operators; see
+The type ``std::complex<double>`` does not support the
+``<`` , ``<=`` , ``>=`` , and ``>`` operators; see
 :ref:`base_cond_exp@CondExpTemplate@Not Ordered` .
-Hence its ``CondExpOp`` function is defined by
+Hence these operators and ``CondExpOp`` function are defined by
 {xrst_spell_off}
 {xrst_code cpp} */
+# define CPPAD_TEMP(op)                                          \
+   inline bool operator op(                                      \
+      const std::complex<double>& left   ,                       \
+      const std::complex<double>& right  )                       \
+   {  CppAD::ErrorHandler::Call(                                 \
+         true     , __LINE__ , __FILE__ ,                        \
+         "std::complex<double> " #op " std::complex<double>" ,   \
+         "Error: std::complex is not an ordered type"            \
+      );                                                         \
+      return false;                                              \
+   }
 namespace CppAD {
+   CPPAD_TEMP(<)
+   CPPAD_TEMP(<=)
+   CPPAD_TEMP(>=)
+   CPPAD_TEMP(>)
    inline std::complex<double> CondExpOp(
       enum CppAD::CompareOp      cop        ,
       const std::complex<double> &left      ,
@@ -65,9 +80,11 @@ namespace CppAD {
       return std::complex<double>(0);
    }
 }
+# undef CPPAD_TEMP
 /* {xrst_code}
 {xrst_spell_on}
 
+
 CondExpRel
 **********
 The :ref:`CPPAD_COND_EXP_REL<base_cond_exp@CondExpRel>` macro invocation
diff --git a/test_more/general/CMakeLists.txt b/test_more/general/CMakeLists.txt
index f00b4d6ce..3484afa87 100644
--- a/test_more/general/CMakeLists.txt
+++ b/test_more/general/CMakeLists.txt
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
 # SPDX-FileCopyrightText: Bradley M. Bell <bradbell@seanet.com>
-# SPDX-FileContributor: 2003-23 Bradley M. Bell
+# SPDX-FileContributor: 2003-24 Bradley M. Bell
 # ----------------------------------------------------------------------------
 # Build the test_more/general tests
 #
@@ -48,6 +48,7 @@ SET(source_list
    azmul.cpp
    base2ad.cpp
    base_alloc.cpp
+   base_complex.cpp
    bool_sparsity.cpp
    check_simple_vector.cpp
    chkpoint_one.cpp
diff --git a/test_more/general/base_complex.cpp b/test_more/general/base_complex.cpp
new file mode 100644
index 000000000..d7787cc18
--- /dev/null
+++ b/test_more/general/base_complex.cpp
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
+// SPDX-FileCopyrightText: Bradley M. Bell <bradbell@seanet.com>
+// SPDX-FileContributor: 2003-24 Bradley M. Bell
+// ----------------------------------------------------------------------------
+
+#include <cppad/cppad.hpp>
+
+bool base_complex(void)
+{  // ok
+   bool ok = true;
+   //
+   // base, ad_base
+   typedef std::complex<double> base;
+   typedef CppAD::AD<base>      ad_base;
+   //
+   // f
+   CPPAD_TESTVECTOR(ad_base) ax(1), ay(1);
+   ax[0] = 0.0;
+   CppAD::Independent(ax);
+   ay[0] = ax[0] * ax[0];
+   CppAD::ADFun<base> f(ax, ay);
+   //
+   // f
+   f.optimize();
+   //
+   // dy
+   std::vector<base> x(1), dx(1), dy(1);
+   x[0]  = 5;
+   f.Forward(0, x);
+   dx[0] = 1;
+   dy    = f.Forward(1, dx);
+   //
+   // ok
+   ok &= dy[0] == 2.0 * x[0];
+   //
+   return ok;
+}
diff --git a/test_more/general/general.cpp b/test_more/general/general.cpp
index 4b9a6c78b..690db99b3 100644
--- a/test_more/general/general.cpp
+++ b/test_more/general/general.cpp
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
 // SPDX-FileCopyrightText: Bradley M. Bell <bradbell@seanet.com>
-// SPDX-FileContributor: 2003-22 Bradley M. Bell
+// SPDX-FileContributor: 2003-24 Bradley M. Bell
 // ----------------------------------------------------------------------------
 
 // CPPAD_HAS_* defines
@@ -71,6 +71,7 @@ extern bool azmul(void);
 extern bool base2ad(void);
 extern bool base_adolc(void);
 extern bool base_alloc_test(void);
+extern bool base_complex(void);
 extern bool bool_sparsity(void);
 extern bool check_simple_vector(void);
 extern bool chkpoint_one(void);
@@ -193,6 +194,7 @@ int main(void)
    Run( atomic_three,    "atomic_three"   );
    Run( azmul,           "azmul"          );
    Run( base2ad,         "base2ad"        );
+   Run( base_complex,    "base_complex"   );
    Run( bool_sparsity,   "bool_sparsity"  );
    Run( check_simple_vector, "check_simple_vector" );
    Run( chkpoint_one,    "chkpoint_one"   );