diff --git a/src/drivers/protocol_splitter/protocol_splitter.cpp b/src/drivers/protocol_splitter/protocol_splitter.cpp
index 0e2372ae6e..0ba92dea08 100644
--- a/src/drivers/protocol_splitter/protocol_splitter.cpp
+++ b/src/drivers/protocol_splitter/protocol_splitter.cpp
@@ -45,6 +45,7 @@
 #include <px4_platform_common/log.h>
 
 #include <sys/ioctl.h>
+#include <assert.h>
 #include <unistd.h>
 #include <cstdint>
 #include <string.h>