Index: libsigc++-2.6.2/sigc++.pc.in
===================================================================
--- libsigc++-2.6.2.orig/sigc++.pc.in
+++ libsigc++-2.6.2/sigc++.pc.in
@@ -15,4 +15,4 @@ Description: Typesafe signal and callbac
 Version: @PACKAGE_VERSION@
 URL: http://libsigc.sourceforge.net/
 Libs: -L${libdir} -lsigc-@SIGCXX_API_VERSION@
-Cflags: -I${includedir}/sigc++-@SIGCXX_API_VERSION@ -I${libdir}/sigc++-@SIGCXX_API_VERSION@/include
+Cflags: -I${includedir}/sigc++-@SIGCXX_API_VERSION@ -I${libdir}/sigc++-@SIGCXX_API_VERSION@/include -std=c++11