diff --git a/libs/libc/misc/lib_impure.c b/libs/libc/misc/lib_impure.c
index eaa75dac9fe..4fbdec066d7 100644
--- a/libs/libc/misc/lib_impure.c
+++ b/libs/libc/misc/lib_impure.c
@@ -44,10 +44,14 @@
  * Public Functions
  ****************************************************************************/
 
-#ifdef _REENT_SMALL
+#if defined(_REENT_SMALL) && \
+   (defined(__NEWLIB__) || __NEWLIB__ < 4 || \
+    __NEWLIB__ == 4 && __NEWLIB_MINOR__ < 2)
 extern struct __sFILE_fake __sf_fake_stdin _ATTRIBUTE((weak));
 extern struct __sFILE_fake __sf_fake_stdout _ATTRIBUTE((weak));
 extern struct __sFILE_fake __sf_fake_stderr _ATTRIBUTE((weak));
+#else
+extern __FILE __sf[3] _ATTRIBUTE((weak));
 #endif
 
 static struct _reent __ATTRIBUTE_IMPURE_DATA__