diff --git a/lib/libc/localtime_r.c b/lib/libc/localtime_r.c
index 659cf4be40..738ad85d26 100644
--- a/lib/libc/localtime_r.c
+++ b/lib/libc/localtime_r.c
@@ -8,6 +8,12 @@
 
 #if HAVE_PTHREAD_MUTEX_INIT
 #include <pthread.h>
+
+/* New mingw pthread package seems to define localtime_r as a macro */
+#ifdef localtime_r
+#undef localtime_r
+#endif
+
 struct tm *
 localtime_r(const time_t *const timep, struct tm *p_tm)
 {