diff --git a/src/gallium/drivers/etnaviv/etnaviv_screen.c b/src/gallium/drivers/etnaviv/etnaviv_screen.c
index 67a55caefd0..098797de036 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_screen.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_screen.c
@@ -166,7 +166,7 @@ etna_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
       return 256;
    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
-      return 4; /* XXX could easily be supported */
+      return 4096;
 
    case PIPE_CAP_NPOT_TEXTURES:
       return true; /* VIV_FEATURE(priv->dev, chipMinorFeatures1,