diff --git a/src/glx/x11/indirect_vertex_program.c b/src/glx/x11/indirect_vertex_program.c
index d0f0d270482..5383dcc9810 100644
--- a/src/glx/x11/indirect_vertex_program.c
+++ b/src/glx/x11/indirect_vertex_program.c
@@ -30,7 +30,8 @@
 #include "indirect_vertex_array.h"
 #include <GL/glxproto.h>
 
-void do_vertex_attrib_enable( GLuint index, GLboolean val )
+static void
+do_vertex_attrib_enable( GLuint index, GLboolean val )
 {
     __GLXcontext *gc = __glXGetCurrentContext();
     __GLXattribute * state = (__GLXattribute *)(gc->client_state_private);