diff --git a/libupnp/upnp/src/genlib/net/http/webserver.c b/libupnp/upnp/src/genlib/net/http/webserver.c
index f5dc1c9..70c7993 100644
--- a/libupnp/upnp/src/genlib/net/http/webserver.c
+++ b/libupnp/upnp/src/genlib/net/http/webserver.c
@@ -280,7 +280,7 @@ search_extension( IN const char *extension,
 *   0 - On Sucess
 *   UPNP_E_OUTOF_MEMORY - on memory allocation failures
 ************************************************************************/
-XINLINE int
+static XINLINE int
 get_content_type( IN const char *filename,
                   OUT DOMString * content_type )
 {