diff --git a/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c b/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c
index 97ea028c939..00dea0399e6 100644
--- a/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c
+++ b/src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c
@@ -2263,6 +2263,13 @@ nir_to_spirv(struct nir_shader *s, const struct zink_so_info *so_info)
       unreachable("invalid stage");
    }
 
+   if (s->info.outputs_written & BITFIELD64_BIT(VARYING_SLOT_VIEWPORT)) {
+      if (s->info.stage < MESA_SHADER_GEOMETRY)
+         spirv_builder_emit_cap(&ctx.builder, SpvCapabilityShaderViewportIndex);
+      else
+         spirv_builder_emit_cap(&ctx.builder, SpvCapabilityMultiViewport);
+   }
+
    // TODO: only enable when needed
    if (s->info.stage == MESA_SHADER_FRAGMENT) {
       spirv_builder_emit_cap(&ctx.builder, SpvCapabilitySampled1D);