diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 6cda4e72d52..b9b8949644a 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,7 @@
+2019-12-05  David Edelsohn  <dje.gcc@gmail.com>
+
+	* cp-gimplify.c: Include memmodel.h.
+
 2019-12-05  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* typeck2.c (build_functional_cast): Add location_t parameter
diff --git a/gcc/cp/cp-gimplify.c b/gcc/cp/cp-gimplify.c
index 992c66eebc0..2b6bd5295d2 100644
--- a/gcc/cp/cp-gimplify.c
+++ b/gcc/cp/cp-gimplify.c
@@ -35,6 +35,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "attribs.h"
 #include "asan.h"
 #include "gcc-rich-location.h"
+#include "memmodel.h"
 #include "tm_p.h"
 #include "output.h"
 #include "file-prefix-map.h"