diff --git a/lzo.changes b/lzo.changes
index 8f859f0..73a7563 100644
--- a/lzo.changes
+++ b/lzo.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sat Oct 30 19:05:43 UTC 2010 - cristian.rodriguez@opensuse.org
+
+- Use GCC visibility.
+
 -------------------------------------------------------------------
 Thu Feb 11 12:30:25 CET 2010 - rguenther@suse.de
 
diff --git a/lzo.spec b/lzo.spec
index 9b7a4fb..b3afffa 100644
--- a/lzo.spec
+++ b/lzo.spec
@@ -104,9 +104,18 @@ Authors:
 %prep
 %setup -q
 %patch1
-
 %build
+export CFLAGS="%optflags -fvisibility=hidden"
 %configure --enable-shared --disable-static --libdir=/%{_lib}
+
+#On windows, the build system defines __LZO_EXPORT1 to
+# __attribute__((dllexport))) which we can abuse to make
+#use of GCC visibility. ;-)
+#see http://gcc.gnu.org/wiki/Visibility
+#If you remove this, you must disable  -fvisibility=hidden in CFLAGS!
+
+echo '#define __LZO_EXPORT1 __attribute__ ((visibility ("default")))' >> config.h
+
 %{__make} %{?_smp_mflags}
 
 %check