diff --git a/src/drivers/lsm303d/lsm303d.cpp b/src/drivers/lsm303d/lsm303d.cpp
index 4f4e5f39c4..00484db797 100644
--- a/src/drivers/lsm303d/lsm303d.cpp
+++ b/src/drivers/lsm303d/lsm303d.cpp
@@ -1773,6 +1773,7 @@ void	reset();
 void	info();
 void	regdump();
 void	usage();
+void	test_error();
 
 /**
  * Start the driver.