diff --git a/libnetfilter_conntrack.spec b/libnetfilter_conntrack.spec
index 993689b..541d54f 100644
--- a/libnetfilter_conntrack.spec
+++ b/libnetfilter_conntrack.spec
@@ -71,7 +71,7 @@ used by conntrack-tools among many other applications.
 %setup -q
 
 %build
-%configure --disable-static --includedir=%_includedir/%name-%version
+%configure --disable-static --includedir="%_includedir/%name-%version"
 make %{?_smp_mflags}
 
 %install