diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index 4cf85fe55cb..c3f2beac96b 100644
--- a/src/amd/vulkan/radv_cmd_buffer.c
+++ b/src/amd/vulkan/radv_cmd_buffer.c
@@ -10370,8 +10370,12 @@ radv_get_ngg_state_num_verts_per_prim(struct radv_cmd_buffer *cmd_buffer)
 {
    const struct radv_shader *last_vgt_shader = cmd_buffer->state.last_vgt_shader;
    const struct radv_dynamic_state *d = &cmd_buffer->state.dynamic;
+   uint32_t num_verts_per_prim = 0;
 
-   return radv_conv_prim_to_gs_out(d->vk.ia.primitive_topology, last_vgt_shader->info.is_ngg) + 1;
+   if (last_vgt_shader->info.stage == MESA_SHADER_VERTEX)
+      num_verts_per_prim = radv_conv_prim_to_gs_out(d->vk.ia.primitive_topology, last_vgt_shader->info.is_ngg) + 1;
+
+   return num_verts_per_prim;
 }
 
 static uint32_t