diff --git a/swift/StableDiffusionCLI/main.swift b/swift/StableDiffusionCLI/main.swift
index 316ab12..4da8e62 100644
--- a/swift/StableDiffusionCLI/main.swift
+++ b/swift/StableDiffusionCLI/main.swift
@@ -155,7 +155,8 @@ struct StableDiffusionSample: ParsableCommand {
     }
 
     func imageName(_ sample: Int, step: Int? = nil) -> String {
-        var name = prompt.replacingOccurrences(of: " ", with: "_")
+        let fileCharLimit = 75
+        var name = prompt.prefix(fileCharLimit).replacingOccurrences(of: " ", with: "_")
         if imageCount != 1 {
             name += ".\(sample)"
         }