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-rw-r--r--src/internal.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/internal.h b/src/internal.h
index d348520..ec60817 100644
--- a/src/internal.h
+++ b/src/internal.h
@@ -42,6 +42,9 @@
#define MAXLNLEN 1024 /* max length for usual line */
#define HXMC_IDENT 0x200571AF
+#if !defined(__cplusplus)
+# define nullptr NULL
+#endif
struct memcont {
size_t alloc, length;