diff --git a/include/boost/math/ccmath/signbit.hpp b/include/boost/math/ccmath/signbit.hpp
index bb12a5b618..87f4cc7c9f 100644
--- a/include/boost/math/ccmath/signbit.hpp
+++ b/include/boost/math/ccmath/signbit.hpp
@@ -14,7 +14,6 @@
 
 #include <cstdint>
 #include <boost/math/tools/assert.hpp>
-#include <boost/math/special_functions/detail/fp_traits.hpp>
 #include <boost/math/ccmath/isnan.hpp>
 #include <boost/math/ccmath/abs.hpp>