diff --git a/aegisub/libaegisub/common/log.cpp b/aegisub/libaegisub/common/log.cpp
index 02231fef9..1f76b6e5f 100644
--- a/aegisub/libaegisub/common/log.cpp
+++ b/aegisub/libaegisub/common/log.cpp
@@ -31,7 +31,6 @@
 #include "libaegisub/cajun/writer.h"
 #include "libaegisub/io.h"
 #include "libaegisub/log.h"
-#include "libaegisub/mutex.h"
 #include "libaegisub/types.h"
 #include "libaegisub/util.h"