diff --git a/src/panfrost/midgard/mir_promote_uniforms.c b/src/panfrost/midgard/mir_promote_uniforms.c
index 2dbea712579..2d7aabed49c 100644
--- a/src/panfrost/midgard/mir_promote_uniforms.c
+++ b/src/panfrost/midgard/mir_promote_uniforms.c
@@ -160,7 +160,8 @@ midgard_promote_uniforms(compiler_context *ctx)
                         if (ins->load_64)
                                 mov.alu.reg_mode = midgard_reg_mode_64;
 
-                        mir_set_bytemask(&mov, mir_bytemask(ins));
+                        uint16_t rounded = mir_round_bytemask_up(mir_bytemask(ins), mov.alu.reg_mode);
+                        mir_set_bytemask(&mov, rounded);
                         mir_insert_instruction_before(ctx, ins, mov);
                 } else {
                         mir_rewrite_index_src(ctx, ins->dest, promoted);