diff --git a/src/gallium/drivers/radeonsi/si_pipe.h b/src/gallium/drivers/radeonsi/si_pipe.h
index 38e40f1405f..a98b6484318 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.h
+++ b/src/gallium/drivers/radeonsi/si_pipe.h
@@ -1551,7 +1551,6 @@ struct pipe_video_buffer *si_video_buffer_create_with_modifiers(struct pipe_cont
                                                                 unsigned int modifiers_count);
 
 /* si_viewport.c */
-void si_get_small_prim_cull_info(struct si_context *sctx, struct si_small_prim_cull_info *out);
 void si_update_vs_viewport_state(struct si_context *ctx);
 void si_init_viewport_functions(struct si_context *ctx);
 
diff --git a/src/gallium/drivers/radeonsi/si_state_viewport.c b/src/gallium/drivers/radeonsi/si_state_viewport.c
index 81020db405a..be184bf5eb9 100644
--- a/src/gallium/drivers/radeonsi/si_state_viewport.c
+++ b/src/gallium/drivers/radeonsi/si_state_viewport.c
@@ -28,7 +28,7 @@
 
 #define SI_MAX_SCISSOR 16384
 
-void si_get_small_prim_cull_info(struct si_context *sctx, struct si_small_prim_cull_info *out)
+static void si_get_small_prim_cull_info(struct si_context *sctx, struct si_small_prim_cull_info *out)
 {
    /* This is needed by the small primitive culling, because it's done
     * in screen space.