diff --git a/apps/code/python_toolbox.cpp b/apps/code/python_toolbox.cpp
index 339be8840..43691e8e4 100644
--- a/apps/code/python_toolbox.cpp
+++ b/apps/code/python_toolbox.cpp
@@ -403,6 +403,7 @@ const ToolboxMessageTree OsModuleChildren[] = {
   ToolboxMessageTree::Leaf(I18n::Message::PythonOsCommandListdir, I18n::Message::PythonOsListdir, false)
 };
 
+#ifdef MICROPY_PY_SYS
 const ToolboxMessageTree SysModuleChildren[] = {
   ToolboxMessageTree::Leaf(I18n::Message::PythonCommandImportSys, I18n::Message::PythonImportSys, false),
   ToolboxMessageTree::Leaf(I18n::Message::PythonCommandImportFromSys, I18n::Message::PythonImportSys, false),
@@ -414,6 +415,7 @@ const ToolboxMessageTree SysModuleChildren[] = {
   ToolboxMessageTree::Leaf(I18n::Message::PythonSysCommandVersion, I18n::Message::PythonSysVersion, false),
   ToolboxMessageTree::Leaf(I18n::Message::PythonSysCommandVersioninfo, I18n::Message::PythonSysVersioninfo, false)
 };
+#endif
 
 const ToolboxMessageTree modulesChildren[] = {
   ToolboxMessageTree::Node(I18n::Message::MathModule, MathModuleChildren),
@@ -427,7 +429,9 @@ const ToolboxMessageTree modulesChildren[] = {
   ToolboxMessageTree::Node(I18n::Message::KandinskyModule, KandinskyModuleChildren),
   ToolboxMessageTree::Node(I18n::Message::IonModule, IonModuleChildren),
   ToolboxMessageTree::Node(I18n::Message::OsModule, OsModuleChildren),
+#ifdef MICROPY_PY_SYS
   ToolboxMessageTree::Node(I18n::Message::SysModule, SysModuleChildren),
+#endif
   ToolboxMessageTree::Node(I18n::Message::TimeModule, TimeModuleChildren)
 };
 
diff --git a/python/port/mpconfigport.h b/python/port/mpconfigport.h
index af81426c3..5f58a24a6 100644
--- a/python/port/mpconfigport.h
+++ b/python/port/mpconfigport.h
@@ -97,7 +97,7 @@
 #define MICROPY_PY_STRUCT (0)
 
 // Whether to provide "sys" module
-#define MICROPY_PY_SYS (1)
+#define MICROPY_PY_SYS (0)
 
 // Whether to provide the "urandom" module
 #define MICROPY_PY_URANDOM (1)