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-rw-r--r--lib/setup_once.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/setup_once.h b/lib/setup_once.h
index b449807db..751102bed 100644
--- a/lib/setup_once.h
+++ b/lib/setup_once.h
@@ -42,7 +42,10 @@
#include <string.h>
#include <stdarg.h>
#include <ctype.h>
+
+#ifdef HAVE_ERRNO_H
#include <errno.h>
+#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>