--- media-gfx/inkscape/inkscape-0.91.ebuild
+++ media-gfx/inkscape/inkscape-0.91.ebuild
@@ -117,6 +117,10 @@
 	# aliasing unsafe wrt #310393
 	append-flags -fno-strict-aliasing
 
+	if has_version \>=dev-libs/libsigc++-2.6.0 ; then
+		append-cxxflags -std=c++11
+	fi
+
 	econf \
 		$(use_enable static-libs static) \
 		$(use_enable nls) \