diff --git a/swissbrowser.spec.in b/swissbrowser.spec.in
index 1986111..52e3bc5 100644
--- a/swissbrowser.spec.in
+++ b/swissbrowser.spec.in
@@ -24,7 +24,8 @@ This package contains the program and shared libraries required at runtime.
 
 %prep
 %setup -q
-./configure --prefix=/usr \
+CPPFLAGS="-std=c++0x -I/usr/include/pkcs11-helper-1.0" \
+    ./configure --prefix=/usr \
             --docdir=/usr/share/doc/packages/@PACKAGENAME@ \
             --libdir=/usr/%_lib \
             --with-qt-install-plugins=/usr/share/qt4/plugins/designer