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-rw-r--r--stdio-common/Makefile4
1 files changed, 1 insertions, 3 deletions
diff --git a/stdio-common/Makefile b/stdio-common/Makefile
index a29924bc7c..5d7ab532f4 100644
--- a/stdio-common/Makefile
+++ b/stdio-common/Makefile
@@ -123,9 +123,7 @@ scanf13-ENV = LOCPATH=$(common-objpfx)localedata
 bug14-ENV = LOCPATH=$(common-objpfx)localedata
 tst-grouping-ENV = LOCPATH=$(common-objpfx)localedata
 
-ifneq (,$(filter %REENTRANT, $(defines)))
-CPPFLAGS += -D_IO_MTSAFE_IO
-endif
+CPPFLAGS += $(libio-mtsafe)
 
 $(objpfx)tst-setvbuf1.out: tst-setvbuf1.expect $(objpfx)tst-setvbuf1
 	$(built-program-cmd) > $@ 2>&1