--- a/configure.in
+++ b/configure.in
@@ -150,6 +150,7 @@
 VCL_CXX_HAS_RTTI
 VCL_CXX_HAS_DYNAMIC_CAST
 VCL_CXX_CHECK_FOR_SCOPE
+VCL_CXX_COMPLEX_POW_WORKS
 VCL_CXX_DEFAULT_VALUE
 VCL_CXX_HAS_MEMBER_TEMPLATES
 VCL_CXX_CAN_DO_PARTIAL_SPECIALIZATION
@@ -307,6 +308,7 @@
 AC_SUBST(VCL_DEFINE_SPECIALIZATION)
 AC_SUBST(VCL_CANNOT_SPECIALIZE_CV)
 AC_SUBST(VCL_NULL_TMPL_ARGS)
+AC_SUBST(VCL_COMPLEX_POW_WORKS)
 AC_SUBST(VCL_DEFAULT_VALUE)
 AC_SUBST(VCL_NO_STATIC_DATA_MEMBERS)
 AC_SUBST(VCL_HAS_TEMPLATE_SYMBOLS)