diff --git a/src/gallium/drivers/iris/iris_resource.c b/src/gallium/drivers/iris/iris_resource.c
index b5a80c62fa4..ed974a8b021 100644
--- a/src/gallium/drivers/iris/iris_resource.c
+++ b/src/gallium/drivers/iris/iris_resource.c
@@ -1625,14 +1625,18 @@ iris_resource_get_param(struct pipe_screen *pscreen,
       }
       return true;
    case PIPE_RESOURCE_PARAM_STRIDE:
-      *value = wants_cc ? 1 :
+      *value = wants_cc ? 64 :
                wants_aux ? res->aux.surf.row_pitch_B : res->surf.row_pitch_B;
 
       /* Mesa's implementation of eglCreateImage rejects strides of zero (see
        * dri2_check_dma_buf_attribs). Ensure we return a non-zero stride as
        * this value may be queried from GBM and passed into EGL.
+       *
+       * Also, although modifiers which use a clear color plane specify that
+       * the plane's pitch should be ignored, some kernels have been found to
+       * require 64-byte alignment.
        */
-      assert(*value);
+      assert(*value != 0 && *value % 64 == 0);
 
       return true;
    case PIPE_RESOURCE_PARAM_OFFSET: