diff --git a/configure.in.in b/configure.in.in
index f7eef21..a533e7f 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(knowit, 0.10)
 AC_C_BIGENDIAN
 AC_CHECK_KDEMAXPATHLEN