diff --git a/configure.ac b/configure.ac
index 3c13d401..8ac49276 100644
--- a/configure.ac
+++ b/configure.ac
@@ -24,7 +24,10 @@ AC_ENABLE_SHARED
 AC_ENABLE_STATIC
 AC_PROG_CC
 AM_PROG_CC_C_O
-CC_FLAG_VISIBILITY #[-fvisibility=hidden]
+
+CC_ATTRIBUTE_VISIBILITY([default], [
+  CC_FLAG_VISIBILITY([CFLAGS="${CFLAGS} -fvisibility=hidden"])
+])
 CC_CHECK_CFLAGS_APPEND([-fno-strict-aliasing])
 CC_CHECK_CFLAGS_APPEND([-g])
 CC_CHECK_CFLAGS_APPEND([-std=gnu89])