diff --git a/include/os/osString.h b/include/os/osString.h
index 09a697d834..995aa4a591 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;
-#ifndef DISALLOW_NCHAR_WITHOUT_ICONV
+#if !defined(DISALLOW_NCHAR_WITHOUT_ICONV) && defined(DARWIN)
 #include "iconv.h"
 #else
 typedef void   *iconv_t;
diff --git a/source/os/src/osString.c b/source/os/src/osString.c
index 7960f84369..18da778227 100644
--- a/source/os/src/osString.c
+++ b/source/os/src/osString.c
@@ -17,6 +17,10 @@
 #define _DEFAULT_SOURCE
 #include "os.h"
 
+#ifndef DISALLOW_NCHAR_WITHOUT_ICONV
+#include "iconv.h"
+#endif
+
 extern int wcwidth(wchar_t c);
 extern int wcswidth(const wchar_t *s, size_t n);