diff --git a/libs/vkd3d-shader/ir.c b/libs/vkd3d-shader/ir.c
index d81dbd8e4..75e445978 100644
--- a/libs/vkd3d-shader/ir.c
+++ b/libs/vkd3d-shader/ir.c
@@ -11230,6 +11230,7 @@ static const struct vsir_validator_instruction_desc vsir_validator_instructions[
     [VKD3DSIH_DMUL] =                             {1,   2, vsir_validate_double_elementwise_operation},
     [VKD3DSIH_DNE] =                              {1,   2, vsir_validate_double_comparison_operation},
     [VKD3DSIH_DRCP] =                             {1,   1, vsir_validate_double_elementwise_operation},
+    [VKD3DSIH_DSX] =                              {1,   1, vsir_validate_float_elementwise_operation},
     [VKD3DSIH_HS_CONTROL_POINT_PHASE] =           {0,   0, vsir_validate_hull_shader_phase},
     [VKD3DSIH_HS_DECLS] =                         {0,   0, vsir_validate_hull_shader_phase},
     [VKD3DSIH_HS_FORK_PHASE] =                    {0,   0, vsir_validate_hull_shader_phase},