diff --git a/simpledisplay.d b/simpledisplay.d
index f9452f4..1e63e5e 100644
--- a/simpledisplay.d
+++ b/simpledisplay.d
@@ -7937,6 +7937,7 @@ class OperatingSystemFont {
 	}
 }
 
+version(Windows)
 private string sliceCString(const(wchar)[] w) {
 	return makeUtf8StringFromWindowsString(cast(wchar*) w.ptr);
 }