diff --git a/src/platforms/posix/drivers/accelsim/accelsim.cpp b/src/platforms/posix/drivers/accelsim/accelsim.cpp
index 7a82cfdff3..8fd91580b0 100644
--- a/src/platforms/posix/drivers/accelsim/accelsim.cpp
+++ b/src/platforms/posix/drivers/accelsim/accelsim.cpp
@@ -47,6 +47,7 @@
 #include <math.h>
 #include <unistd.h>
 #include <px4_getopt.h>
+#include <errno.h>
 
 #include <simulator/simulator.h>