diff --git a/aegisub/libaegisub/unix/log.cpp b/aegisub/libaegisub/unix/log.cpp
index 8f9469778..a892ba88a 100644
--- a/aegisub/libaegisub/unix/log.cpp
+++ b/aegisub/libaegisub/unix/log.cpp
@@ -39,7 +39,7 @@ void EmitSTDOUT::log(SinkMessage *sm) {
 		tmtime.tm_hour,
 		tmtime.tm_min,
 		tmtime.tm_sec,
-		sm->tv.tv_usec,
+		(long)sm->tv.tv_usec,
 		sm->section,
 		sm->file,
 		sm->func,