1 files changed, 5 insertions, 0 deletions
diff --git a/def.h b/def.h
index 676b395..34bc767 100644
--- a/def.h
+++ b/def.h
@@ -38,6 +38,11 @@ in this Software without prior written authorization from The Open Group.
 #include <fcntl.h>
 #include <sys/stat.h>
 
+#ifndef HAVE_REALLOCARRAY
+#define reallocarray(ptr, num, size)    realloc(ptr, (num) * (size))
+#endif
+#define mallocarray(num, size)          reallocarray(NULL, num, size)
+
 #define MAXDEFINES	512
 #define MAXFILES	2048
 #define MAXINCFILES	128     /* "-include" files */