diff --git a/rsLocklessFifo.h b/rsLocklessFifo.h
index ae906ca..b8ceeed 100644
--- a/rsLocklessFifo.h
+++ b/rsLocklessFifo.h
@@ -62,6 +62,7 @@
     void next();
 
     void makeSpace(uint32_t bytes);
+    bool makeSpaceNonBlocking(uint32_t bytes);
 
     bool isEmpty() const;
     uint32_t getFreeSpace() const;