diff --git a/wadsrc/static/zscript/doombase.zs b/wadsrc/static/zscript/doombase.zs
index 1aef08e75..6c3bd45f8 100644
--- a/wadsrc/static/zscript/doombase.zs
+++ b/wadsrc/static/zscript/doombase.zs
@@ -125,7 +125,7 @@ extend class Object
 	{
 		return level.PickPlayerStart(pnum, flags);
 	}
-	deprecated("4.3", "Use S_StartSound() instead") native static void S_Sound (Sound sound_id, int channel, float volume = 1, float attenuation = ATTN_NORM, float pitch = 0.0, float startTime);
+	deprecated("4.3", "Use S_StartSound() instead") native static void S_Sound (Sound sound_id, int channel, float volume = 1, float attenuation = ATTN_NORM, float pitch = 0.0, float startTime = 0.0);
 	native static void S_StartSound (Sound sound_id, int channel, int flags = 0, float volume = 1, float attenuation = ATTN_NORM, float pitch = 0.0, float startTime = 0.0);
 	native static void S_PauseSound (bool notmusic, bool notsfx);
 	native static void S_ResumeSound (bool notsfx);