diff --git a/uppsrc/VirtualGui/ChSysInit.cpp b/uppsrc/VirtualGui/ChSysInit.cpp
index d6566f219..2e7ef5600 100644
--- a/uppsrc/VirtualGui/ChSysInit.cpp
+++ b/uppsrc/VirtualGui/ChSysInit.cpp
@@ -14,6 +14,11 @@ void ChHostSkin()
 	ChSysInit();
 }
 
+bool IsSystemThemeDark()
+{
+	return false;
+}
+
 END_UPP_NAMESPACE
 
 #endif
diff --git a/uppsrc/VirtualGui/Nil/Nil.upp b/uppsrc/VirtualGui/Nil/Nil.upp
index 515650389..32f6126a2 100644
--- a/uppsrc/VirtualGui/Nil/Nil.upp
+++ b/uppsrc/VirtualGui/Nil/Nil.upp
@@ -1,3 +1,5 @@
+description "Empty GUI implementation - to link GUI packages with console application\377";
+
 uses
 	VirtualGui;