diff --git a/ChangeLog b/ChangeLog
index 1719c9d556..b3689a68c9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2018-08-30  Florian Weimer  <fweimer@redhat.com>
+
+	* stdlib/stdlib.h (reallocarray): Make available under __USE_MISC.
+
 2018-08-30  Stefan Liebler  <stli@linux.ibm.com>
 
 	* stdlib/test-bz22786.c (do_test): Return EXIT_UNSUPPORTED
diff --git a/NEWS b/NEWS
index 639fb56c9f..325157c0da 100644
--- a/NEWS
+++ b/NEWS
@@ -18,6 +18,9 @@ Major new features:
 
 * Optimized generic sinf, cosf, sincosf and tanf.
 
+* The reallocarray function is now declared under _DEFAULT_SOURCE, not just
+  for _GNU_SOURCE, to match BSD environments.
+
 Deprecated and removed features, and other changes affecting compatibility:
 
 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
diff --git a/stdlib/stdlib.h b/stdlib/stdlib.h
index 8e23e93557..870e02d904 100644
--- a/stdlib/stdlib.h
+++ b/stdlib/stdlib.h
@@ -549,7 +549,7 @@ extern void *calloc (size_t __nmemb, size_t __size)
 extern void *realloc (void *__ptr, size_t __size)
      __THROW __attribute_warn_unused_result__;
 
-#ifdef __USE_GNU
+#ifdef __USE_MISC
 /* Re-allocate the previously allocated block in PTR, making the new
    block large enough for NMEMB elements of SIZE bytes each.  */
 /* __attribute_malloc__ is not used, because if reallocarray returns