2 files changed, 10 insertions, 0 deletions

diff --git a/src/mktime.c b/src/mktime.c
index f759c29bb96..a6e2756aebe 100644
--- a/src/mktime.c
+++ b/src/mktime.c
@@ -27,6 +27,11 @@
 # include <config.h>
 #endif
 
+/* Some hosts need this in order to declare localtime_r properly.  */
+#ifndef _REENTRANT
+# define _REENTRANT 1
+#endif
+
 #ifdef _LIBC
 # define HAVE_LIMITS_H 1
 # define HAVE_LOCALTIME_R 1
diff --git a/src/strftime.c b/src/strftime.c
index b084851a451..90b21471904 100644
--- a/src/strftime.c
+++ b/src/strftime.c
@@ -22,6 +22,11 @@
 # include <config.h>
 #endif
 
+/* Some hosts need this in order to declare localtime_r properly.  */
+#ifndef _REENTRANT
+# define _REENTRANT 1
+#endif
+
 #ifdef _LIBC
 # define HAVE_LIMITS_H 1
 # define HAVE_MBLEN 1