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-rw-r--r--testsuites/support/include/buffer_test_io.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/testsuites/support/include/buffer_test_io.h b/testsuites/support/include/buffer_test_io.h
index 18902424f0..764170710c 100644
--- a/testsuites/support/include/buffer_test_io.h
+++ b/testsuites/support/include/buffer_test_io.h
@@ -23,7 +23,7 @@ extern "C" {
#if !defined(TESTS_BUFFER_OUTPUT)
/* do not use iprintf if strict ansi mode */
-#ifndef __STRICT_ANSI__
+#if defined(_NEWLIB_VERSION) && !defined(__STRICT_ANSI__)
#undef printf
#define printf(...) \
do { \