diff --git a/configure.ac b/configure.ac
index 4d9c8ae9..85fc1f9c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1334,6 +1334,7 @@ AC_SUBST(SSE41_CXXFLAGS)
 AC_SUBST(AVX2_CXXFLAGS)
 AC_SUBST(LIBTOOL_APP_LDFLAGS)
 AC_SUBST(USE_UPNP)
+AC_SUBST(HAVE_GMTIME_R)
 AC_SUBST(USE_QRCODE)
 AC_SUBST(BOOST_LIBS)
 AC_SUBST(TESTDEFS)