diff --git a/src/cairo-xcb-connection.c b/src/cairo-xcb-connection.c
index 0c3bd5ae8..de1bb179b 100644
--- a/src/cairo-xcb-connection.c
+++ b/src/cairo-xcb-connection.c
@@ -910,6 +910,9 @@ cairo_xcb_device_debug_set_precision (cairo_device_t *device,
 
     ((cairo_xcb_connection_t *) device)->force_precision = precision;
 }
+#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
+slim_hidden_def (cairo_xcb_device_debug_set_precision);
+#endif
 
 int
 cairo_xcb_device_debug_get_precision (cairo_device_t *device)
@@ -919,3 +922,6 @@ cairo_xcb_device_debug_get_precision (cairo_device_t *device)
 
     return ((cairo_xcb_connection_t *) device)->force_precision;
 }
+#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
+slim_hidden_def (cairo_xcb_device_debug_get_precision);
+#endif
diff --git a/src/cairo-xcb-private.h b/src/cairo-xcb-private.h
index 4704a25da..45b7bbee1 100644
--- a/src/cairo-xcb-private.h
+++ b/src/cairo-xcb-private.h
@@ -760,6 +760,8 @@ slim_hidden_proto (cairo_xcb_surface_create);
 slim_hidden_proto (cairo_xcb_surface_create_for_bitmap);
 slim_hidden_proto (cairo_xcb_surface_create_with_xrender_format);
 slim_hidden_proto (cairo_xcb_surface_set_size);
+slim_hidden_proto (cairo_xcb_device_debug_get_precision);
+slim_hidden_proto_no_warn (cairo_xcb_device_debug_set_precision);
 #endif
 
 #endif /* CAIRO_XCB_PRIVATE_H */