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-rw-r--r--crawl-ref/source/AppHdr.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/crawl-ref/source/AppHdr.h b/crawl-ref/source/AppHdr.h
index f417f201ab..3c91b2ef07 100644
--- a/crawl-ref/source/AppHdr.h
+++ b/crawl-ref/source/AppHdr.h
@@ -112,7 +112,9 @@
#define USE_MORE_SECURE_SEED
// Use POSIX regular expressions
+ #ifndef REGEX_PCRE
#define REGEX_POSIX
+ #endif
// If you have libpcre, you can use that instead of POSIX regexes -
// uncomment the line below and add -lpcre to your makefile.