diff --git a/src/system/libroot/posix/assert.cpp b/src/system/libroot/posix/assert.cpp
index 851ca17bf7..aec2c545bf 100644
--- a/src/system/libroot/posix/assert.cpp
+++ b/src/system/libroot/posix/assert.cpp
@@ -13,6 +13,7 @@
 #include <assert.h>
 #include <signal.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>