diff --git a/editors/libreoffice/Makefile b/editors/libreoffice/Makefile
index e09d29341c1..1fde735161e 100644
--- a/editors/libreoffice/Makefile
+++ b/editors/libreoffice/Makefile
@@ -286,6 +286,8 @@ CONFIGURE_STYLE=	gnu
 AUTOCONF_VERSION=	2.69
 AUTOMAKE_VERSION=	1.12
 
+CXXFLAGS +=	-D_LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION
+
 CONFIGURE_ENV=	CONFIG_SHELL=${LOCALBASE}/bin/bash \
 		CPPFLAGS="-I${LOCALBASE}/include -I${X11BASE}/include" \
 		LDFLAGS="-L${LOCALBASE}/lib -L${X11BASE}/lib -Wl,--threads=${MAKE_JOBS}" \