diff --git a/gtkmm/Pkgfile b/gtkmm/Pkgfile
index 352c98376..ee4af65cc 100644
--- a/gtkmm/Pkgfile
+++ b/gtkmm/Pkgfile
@@ -12,6 +12,8 @@ source=(http://ftp.gnome.org/pub/GNOME/sources/$name/${version%.*}/$name-$versio
 build() {
 	cd $name-$version
 
+	CXXFLAGS+=' -std=c++11'
+
 	./configure \
 		--prefix=/usr \
 		--disable-dependency-tracking \