diff --git a/src/core/mem/dl_malloc.c b/src/core/mem/dl_malloc.c
index c4b0b214487..8752e5d9da4 100644
--- a/src/core/mem/dl_malloc.c
+++ b/src/core/mem/dl_malloc.c
@@ -1192,7 +1192,7 @@ int mspace_mallopt(int, int);
 extern void*     sbrk(ptrdiff_t);
 #endif /* FreeBSD etc */
 #endif /* LACKS_UNISTD_H */
-#endif /* HAVE_MMAP */
+#endif /* HAVE_MORECORE */
 
 #ifndef WIN32
 #ifndef malloc_getpagesize