diff --git a/extensions-builtin/sd_forge_spectrum/scripts/spectrum.py b/extensions-builtin/sd_forge_spectrum/scripts/spectrum.py
index a218f80c..7f29b21a 100644
--- a/extensions-builtin/sd_forge_spectrum/scripts/spectrum.py
+++ b/extensions-builtin/sd_forge_spectrum/scripts/spectrum.py
@@ -1,7 +1,7 @@
 import gradio as gr
 from lib_spectrum.forecaster import SpectrumNode
 
-from modules import scripts
+from modules import scripts, shared
 from modules.infotext_utils import PasteField
 from modules.ui_components import InputAccordion
 
@@ -93,6 +93,10 @@ class SpectrumForForge(scripts.Script):
         if not enable:
             return
 
+        if shared.opts.skip_early_cond > 0.0 or shared.opts.s_min_uncond > 0.0:
+            print('Spectrum does not support "Ignore/Skip Negative Prompt" optimizations...')
+            return
+
         unet = p.sd_model.forge_objects.unet
         unet = SpectrumNode.patch(unet, p.steps, *args)
         p.sd_model.forge_objects.unet = unet