1 files changed, 1 insertions, 1 deletions

diff --git a/src/ByteBuffer.h b/src/ByteBuffer.h
index cbf215f38..f730c594e 100644
--- a/src/ByteBuffer.h
+++ b/src/ByteBuffer.h
@@ -149,7 +149,7 @@ protected:
 	size_t m_WritePos;   // Where the data ends in the ringbuffer
 	size_t m_ReadPos;    // Where the next read will start in the ringbuffer
 
-	#ifdef _DEBUG
+	#ifndef NDEBUG
 		/** The ID of the thread currently accessing the object.
 		Used for checking that only one thread accesses the object at a time, via cSingleThreadAccessChecker. */
 		mutable std::thread::id m_ThreadID;