diff --git a/ChangeLog b/ChangeLog
index f9ca538705..448be4793d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-10-18  Wilco Dijkstra  <wdijkstr@arm.com>
+
+	* malloc/malloc.c (malloc_state): Use int for have_fastchunks since
+	not all targets support atomics on bool.
+
 2017-10-17  Joseph Myers  <joseph@codesourcery.com>
 
 	* include/float.h [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 &&
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 51db44f61b..6b789685ad 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -1673,7 +1673,8 @@ struct malloc_state
   int flags;
 
   /* Set if the fastbin chunks contain recently inserted free blocks.  */
-  bool have_fastchunks;
+  /* Note this is a bool but not all targets support atomics on booleans.  */
+  int have_fastchunks;
 
   /* Fastbins */
   mfastbinptr fastbinsY[NFASTBINS];