diff --git a/src/modules/ekf2_replay/ekf2_replay_main.cpp b/src/modules/ekf2_replay/ekf2_replay_main.cpp
index cd251bc0a5..0ae81c704a 100644
--- a/src/modules/ekf2_replay/ekf2_replay_main.cpp
+++ b/src/modules/ekf2_replay/ekf2_replay_main.cpp
@@ -176,7 +176,7 @@ private:
 	bool _read_part5;
 
 	int _write_fd = -1;
-	px4_pollfd_struct_t _fds[1];
+	px4_pollfd_struct_t _fds[1] {};
 
 	// parse replay message from buffer
 	// @source 			pointer to log message data (excluding header)