diff --git a/include/os/osString.h b/include/os/osString.h
index 995aa4a591..09a697d834 100644
--- a/include/os/osString.h
+++ b/include/os/osString.h
@@ -22,7 +22,7 @@ extern "C" {
 
 typedef wchar_t TdWchar;
 typedef int32_t TdUcs4;
-#if !defined(DISALLOW_NCHAR_WITHOUT_ICONV) && defined(DARWIN)
+#ifndef DISALLOW_NCHAR_WITHOUT_ICONV
 #include "iconv.h"
 #else
 typedef void   *iconv_t;