diff --git a/libs/vkd3d-shader/spirv.c b/libs/vkd3d-shader/spirv.c
index fb08ab11..b16c15b2 100644
--- a/libs/vkd3d-shader/spirv.c
+++ b/libs/vkd3d-shader/spirv.c
@@ -1409,6 +1409,7 @@ static uint32_t vkd3d_spirv_build_op_glsl_std450_nclamp(struct vkd3d_spirv_build
 {
     uint32_t glsl_std450_id = vkd3d_spirv_get_glsl_std450_instr_set(builder);
     uint32_t operands[] = {x, min, max};
+    /* XXX: We would prefer to use NClamp but NClamp crashes the Nvidia driver. */
     return vkd3d_spirv_build_op_ext_inst(builder, result_type, glsl_std450_id,
             GLSLstd450FClamp, operands, ARRAY_SIZE(operands));
 }
@@ -3548,6 +3549,9 @@ static enum GLSLstd450 vkd3d_dxbc_compiler_map_ext_glsl_instruction(
         {VKD3DSIH_IMIN,            GLSLstd450SMin},
         {VKD3DSIH_LOG,             GLSLstd450Log2},
         {VKD3DSIH_MAD,             GLSLstd450Fma},
+        /* XXX: We would prefer to use NMax/NMin but these opcodes lead to
+         * a crash in the Nvidia driver.
+         */
         {VKD3DSIH_MAX,             GLSLstd450FMax},
         {VKD3DSIH_MIN,             GLSLstd450FMin},
         {VKD3DSIH_ROUND_NI,        GLSLstd450Floor},