diff --git a/test/test_polygamma.cpp b/test/test_polygamma.cpp
index 81cbd8324..a3c565ff6 100644
--- a/test/test_polygamma.cpp
+++ b/test/test_polygamma.cpp
@@ -41,7 +41,7 @@ void expected_results()
       largest_type,                  // test type(s)
       ".*negative.*",                // test data group
       ".*", 800, 400);               // test function
-#ifndef #ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
+#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
    if((std::numeric_limits<long double>::digits > std::numeric_limits<double>::digits)
       && (std::numeric_limits<long double>::digits - std::numeric_limits<double>::digits < 20))
    {