diff --git a/app/audio/tempoprocessor.cpp b/app/audio/tempoprocessor.cpp
index bbcd08b7d..d495d10c9 100644
--- a/app/audio/tempoprocessor.cpp
+++ b/app/audio/tempoprocessor.cpp
@@ -14,6 +14,7 @@ TempoProcessor::TempoProcessor() :
   filter_graph_(nullptr),
   buffersrc_ctx_(nullptr),
   buffersink_ctx_(nullptr),
+  processed_frame_(nullptr),
   open_(false)
 {