diff --git a/scripts/prompt_matrix.py b/scripts/prompt_matrix.py
index 4efd0dfbe..77ce207a7 100644
--- a/scripts/prompt_matrix.py
+++ b/scripts/prompt_matrix.py
@@ -92,7 +92,7 @@ class Script(scripts.Script):
             p.prompt = all_prompts
         else:
             p.negative_prompt = all_prompts
-        p.seed = [p.seed + (i if different_seeds else 0) for i in range(len(all_prompts))]
+        p.seed = [int(p.seed + (i if different_seeds else 0)) for i in range(len(all_prompts))]
         p.prompt_for_display = positive_prompt
         processed = process_images(p)