--- /dev/null
+--- a/src/outputs.h
++++ b/src/outputs.h
+@@ -185,7 +185,7 @@ struct output_data
+ int samples;
+ };
+
+-struct output_buffer
++static struct output_buffer
+ {
+ struct timespec pts;
+ // The array is two larger than max quality subscriptions because element 0
+@@ -262,7 +262,7 @@ struct output_definition
+ };
+
+ // Our main list of devices, not for use by backend modules
+-struct output_device *output_device_list;
++static struct output_device *output_device_list;
+
+ /* ------------------------------- General use ------------------------------ */
+