diff --git a/configure.in.in b/configure.in.in
index 8c278ce..6b09cf3 100644
--- a/configure.in.in
+++ b/configure.in.in
@@ -1,5 +1,7 @@
 #MIN_CONFIG(3.0.0)
 
+KDE_ENABLE_HIDDEN_VISIBILITY
+
 AM_INIT_AUTOMAKE(knights,0.6)
 AC_PREREQ(2.5)