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-rw-r--r--ext/clogger_ext/clogger.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/ext/clogger_ext/clogger.c b/ext/clogger_ext/clogger.c
index a1f3bc4..a3de120 100644
--- a/ext/clogger_ext/clogger.c
+++ b/ext/clogger_ext/clogger.c
@@ -1,3 +1,6 @@
+/* quiet deprecation for _BSD_SOURCE and _SVID_SOURCE: */
+#define _DEFAULT_SOURCE 1
+
 #include <ruby.h>
 #ifdef HAVE_RUBY_IO_H
 #  include <ruby/io.h>