diff --git a/libs/vkd3d-shader/hlsl_sm4.c b/libs/vkd3d-shader/hlsl_sm4.c
index fa845dc4..567d311b 100644
--- a/libs/vkd3d-shader/hlsl_sm4.c
+++ b/libs/vkd3d-shader/hlsl_sm4.c
@@ -1632,6 +1632,11 @@ static void write_sm4_expr(struct hlsl_ctx *ctx,
             write_sm4_binary_op(buffer, VKD3D_SM4_OP_AND, &expr->node, arg1, arg2);
             break;
 
+        case HLSL_OP2_BIT_OR:
+            assert(type_is_integer(dst_type));
+            write_sm4_binary_op(buffer, VKD3D_SM4_OP_OR, &expr->node, arg1, arg2);
+            break;
+
         case HLSL_OP2_DIV:
             switch (dst_type->base_type)
             {