diff --git a/VoiceInk/Services/NativeAppleTranscriptionService.swift b/VoiceInk/Services/NativeAppleTranscriptionService.swift
index 2ed95bc..06754ca 100644
--- a/VoiceInk/Services/NativeAppleTranscriptionService.swift
+++ b/VoiceInk/Services/NativeAppleTranscriptionService.swift
@@ -62,7 +62,7 @@ class NativeAppleTranscriptionService: TranscriptionService {
             throw ServiceError.unsupportedOS
         }
         
-        #if canImport(Speech)
+        #if canImport(Speech) && compiler(>=6.0) && swift(>=6.0)
         logger.notice("Starting Apple native transcription with SpeechAnalyzer.")
         
         let audioFile = try AVAudioFile(forReading: audioURL)
@@ -143,11 +143,12 @@ class NativeAppleTranscriptionService: TranscriptionService {
         return finalTranscription
         
         #else
-        logger.error("Speech framework is not available")
+        logger.error("SpeechTranscriber is not available in this compiler version or Speech framework is not available")
         throw ServiceError.unsupportedOS
         #endif
     }
     
+    #if compiler(>=6.0) && swift(>=6.0)
     @available(macOS 26, *)
     private func deallocateExistingAssets() async throws {
         #if canImport(Speech)
@@ -158,7 +159,9 @@ class NativeAppleTranscriptionService: TranscriptionService {
         logger.notice("Deallocated existing asset locales.")
         #endif
     }
+    #endif
     
+    #if compiler(>=6.0) && swift(>=6.0)
     @available(macOS 26, *)
     private func allocateAssetsForLocale(_ locale: Locale) async throws {
         #if canImport(Speech)
@@ -171,7 +174,9 @@ class NativeAppleTranscriptionService: TranscriptionService {
         }
         #endif
     }
+    #endif
     
+    #if compiler(>=6.0) && swift(>=6.0)
     @available(macOS 26, *)
     private func ensureModelIsAvailable(for transcriber: SpeechTranscriber, locale: Locale) async throws {
         #if canImport(Speech)
@@ -191,4 +196,5 @@ class NativeAppleTranscriptionService: TranscriptionService {
         }
         #endif
     }
+    #endif
 }