diff --git a/include/stdlib.h b/include/stdlib.h
index f8cf9d7b24..b178250e70 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -182,7 +182,7 @@ void      _exit(int status); /* See unistd.h */
  */
 
 #ifndef __KERNEL__
-int       system(FAR char *cmd);
+int       system(FAR const char *cmd);
 #endif
 
 /* String to binary conversions */