diff --git a/include/Spectre/System/Log/Writer.h b/include/Spectre/System/Log/Writer.h
index 9ecefaf..7e7e247 100644
--- a/include/Spectre/System/Log/Writer.h
+++ b/include/Spectre/System/Log/Writer.h
@@ -9,6 +9,8 @@ public:
 	virtual ~Writer() {}
 
 	virtual size_t write(const void *data, size_t len) = 0;
+
+	virtual bool flush() = 0;
 };