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-rw-r--r--libguile/stime.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/libguile/stime.c b/libguile/stime.c
index bf784be47..568f577c2 100644
--- a/libguile/stime.c
+++ b/libguile/stime.c
@@ -19,6 +19,7 @@
#define _GNU_SOURCE /* ask glibc for everything, in particular strptime */
+#define _POSIX_C_SOURCE 199506L /* for gmtime_r prototype */
#if HAVE_CONFIG_H
# include <config.h>