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-rw-r--r--lib/curl_ctype.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/curl_ctype.c b/lib/curl_ctype.c
index 70db1630d..4f5abc207 100644
--- a/lib/curl_ctype.c
+++ b/lib/curl_ctype.c
@@ -22,13 +22,21 @@
#include "curl_setup.h"
+#undef _U
#define _U (1<<0) /* upper case */
+#undef _L
#define _L (1<<1) /* lower case */
+#undef _N
#define _N (1<<2) /* decimal numerical digit */
+#undef _S
#define _S (1<<3) /* space */
+#undef _P
#define _P (1<<4) /* punctuation */
+#undef _C
#define _C (1<<5) /* control */
+#undef _X
#define _X (1<<6) /* hexadecimal letter */
+#undef _B
#define _B (1<<7) /* blank */
static const unsigned char ascii[128] = {