diff --git a/include/wlr/types/wlr_surface.h b/include/wlr/types/wlr_surface.h
index 2bfd1bc9..5c5b012f 100644
--- a/include/wlr/types/wlr_surface.h
+++ b/include/wlr/types/wlr_surface.h
@@ -100,20 +100,6 @@ struct wlr_renderer;
 struct wlr_surface *wlr_surface_create(struct wl_resource *res,
 		struct wlr_renderer *renderer);
 
-/**
- * Gets a matrix you can pass into wlr_render_with_matrix to display this
- * surface. `matrix` is the output matrix, `projection` is the wlr_output
- * projection matrix, and `transform` is any additional transformations you want
- * to perform on the surface (or NULL/the identity matrix if you don't).
- * `transform` is used before the surface is scaled, so its geometry extends
- * from 0 to 1 in both dimensions.
- */
-void wlr_surface_get_matrix(struct wlr_surface *surface,
-		float mat[static 9],
-		const float projection[static 9],
-		const float transform[static 9]);
-
-
 /**
  * Set the lifetime role for this surface. Returns 0 on success or -1 if the
  * role cannot be set.
diff --git a/types/wlr_surface.c b/types/wlr_surface.c
index cf00a1e6..b3e0dcd8 100644
--- a/types/wlr_surface.c
+++ b/types/wlr_surface.c
@@ -628,18 +628,6 @@ struct wlr_surface *wlr_surface_create(struct wl_resource *res,
 	return surface;
 }
 
-void wlr_surface_get_matrix(struct wlr_surface *surface, float mat[static 9],
-		const float projection[static 9], const float transform[static 9]) {
-	int width = surface->texture->width;
-	int height = surface->texture->height;
-	wlr_matrix_identity(mat);
-	if (transform != NULL) {
-		wlr_matrix_multiply(mat, mat, transform);
-	}
-	wlr_matrix_scale(mat, width, height);
-	wlr_matrix_multiply(mat, projection, mat);
-}
-
 bool wlr_surface_has_buffer(struct wlr_surface *surface) {
 	return surface->texture && surface->texture->valid;
 }