diff --git a/src/common.h b/src/common.h
new file mode 100644
index 0000000..e339b40
--- /dev/null
+++ b/src/common.h
@@ -0,0 +1,35 @@
+/*
+ * This file is part of linux-steam-integration.
+ *
+ * Copyright © 2016-2017 Ikey Doherty
+ *
+ * linux-steam-integration is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1
+ * of the License, or (at your option) any later version.
+ */
+
+#pragma once
+
+#define _GNU_SOURCE
+
+/* Mark a variable/argument as unused to skip warnings */
+#define __lsi_unused__ __attribute__((unused))
+
+/* Force inlining of a function */
+#define __lsi_inline__ __attribute__((always_inline))
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 8
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=8 tabstop=8 expandtab:
+ * :indentSize=8:tabSize=8:noTabs=true:
+ */
diff --git a/src/intercept/main.c b/src/intercept/main.c
index e73e174..d2a4784 100644
--- a/src/intercept/main.c
+++ b/src/intercept/main.c
@@ -11,13 +11,13 @@
 
 #define _GNU_SOURCE
 
-#include "../shim/lsi.h"
-#include "nica/nica.h"
-
 #include <link.h>
 #include <stdio.h>
 #include <stdlib.h>
 
+#include "../common.h"
+#include "nica/nica.h"
+
 /**
  * Is this a process we're actually interested in?
  */
diff --git a/src/shim/lsi.h b/src/shim/lsi.h
index 87097e3..2d4da34 100644
--- a/src/shim/lsi.h
+++ b/src/shim/lsi.h
@@ -20,16 +20,9 @@
 #include <sys/stat.h>
 #include <unistd.h>
 
+#include "../common.h"
 #include "config.h"
 
-/* Mark a variable/argument as unused to skip warnings */
-#define __lsi_unused__ __attribute__((unused))
-
-/* Force inlining of a function */
-#define __lsi_inline__ __attribute__((always_inline))
-
-#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
-
 /**
  * Current Linux Steam Integration settings.
  */