diff --git a/configure.in.in b/configure.in.in
index c03082c..5e57646 100644
--- a/configure.in.in
+++ b/configure.in.in
@@ -1,4 +1,5 @@
 #MIN_CONFIG(3.0.0)
+KDE_ENABLE_HIDDEN_VISIBILITY
 
 AM_INIT_AUTOMAKE(kbarcode, 2.0.6)
 AC_C_BIGENDIAN