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-rw-r--r--cpukit/libnetworking/Makefile.am2
1 files changed, 1 insertions, 1 deletions
diff --git a/cpukit/libnetworking/Makefile.am b/cpukit/libnetworking/Makefile.am
index e07ec5f3df..15c6ea6c9b 100644
--- a/cpukit/libnetworking/Makefile.am
+++ b/cpukit/libnetworking/Makefile.am
@@ -149,7 +149,7 @@ include_dev_mii_HEADERS = dev/mii/mii.h
## libc
-libc_CPPFLAGS = -DNOPOLL -DNOSELECT -D__BSD_VISIBLE
+libc_CPPFLAGS = -DNOPOLL -DNOSELECT -D__BSD_VISIBLE -D_THREAD_SAFE
noinst_LIBRARIES += libc.a
libc_a_CPPFLAGS = $(AM_CPPFLAGS) $(libc_CPPFLAGS)