diff --git a/proxyface.spec.in b/proxyface.spec.in
index a62a317..14a2645 100644
--- a/proxyface.spec.in
+++ b/proxyface.spec.in
@@ -22,9 +22,10 @@ This package contains only the shared libraries required at runtime.
 
 %prep
 %setup -q
-./configure --prefix=/usr \
-            --docdir=/usr/share/doc/packages/@PACKAGENAME@ \
-            --libdir=/usr/%_lib
+CPPFLAGS="-std=c++0x -I/usr/include/PCSC -I/usr/include/p11-kit-1/p11-kit" \
+  ./configure --prefix=/usr \
+              --docdir=/usr/share/doc/packages/@PACKAGENAME@ \
+              --libdir=/usr/%_lib
 
 %build
 make