diff --git a/apps/dsm/mods/CMakeLists.txt b/apps/dsm/mods/CMakeLists.txt
index e37d05e9..91369c93 100644
--- a/apps/dsm/mods/CMakeLists.txt
+++ b/apps/dsm/mods/CMakeLists.txt
@@ -8,7 +8,7 @@ IF(MYSQLPP_FOUND)
 	ADD_SUBDIRECTORY (mod_mysql)
 ENDIF(MYSQLPP_FOUND)
 ADD_SUBDIRECTORY (mod_py)
-#ADD_SUBDIRECTORY (mod_sys)
+ADD_SUBDIRECTORY (mod_sys)
 ADD_SUBDIRECTORY (mod_uri)
 ADD_SUBDIRECTORY (mod_utils)
 
diff --git a/apps/dsm/mods/mod_sys/ModSys.cpp b/apps/dsm/mods/mod_sys/ModSys.cpp
index eb26c136..3375b638 100644
--- a/apps/dsm/mods/mod_sys/ModSys.cpp
+++ b/apps/dsm/mods/mod_sys/ModSys.cpp
@@ -98,7 +98,12 @@ EXEC_ACTION_START(SCMkDirAction) {
 bool sys_get_parent_dir(const char* path, char* parentPath) {
 
   //size_t pos = strcspn(dirPath, "/\\");
-  char* ptr = strrchr(path, '/'); // search char from end reverse
+#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
+  const char* ptr;
+#else
+  char* ptr;
+#endif
+  ptr = strrchr(path, '/'); // search char from end reverse
   if (ptr == NULL) {
     ptr = strrchr(path, '\\'); // search char from end reverse
     if (ptr == NULL) {