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-rw-r--r--ares/setup_once.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/ares/setup_once.h b/ares/setup_once.h
index 0ff1d65a1..6cfa526f7 100644
--- a/ares/setup_once.h
+++ b/ares/setup_once.h
@@ -115,6 +115,7 @@
*/
#define ISSPACE(x) (isspace((int) ((unsigned char)x)))
+#define ISBLANK(x) (isblank((int) ((unsigned char)x)))
#define ISDIGIT(x) (isdigit((int) ((unsigned char)x)))
#define ISALNUM(x) (isalnum((int) ((unsigned char)x)))
#define ISXDIGIT(x) (isxdigit((int) ((unsigned char)x)))