diff --git a/include/Support/hash_map b/include/Support/hash_map
index b52474735fe..68ee596a855 100644
--- a/include/Support/hash_map
+++ b/include/Support/hash_map
@@ -39,4 +39,6 @@
 using HASH_NAMESPACE::hash_map;
 using HASH_NAMESPACE::hash;
 
+#include <Support/HashExtras.h>
+
 #endif
diff --git a/include/Support/hash_set b/include/Support/hash_set
index 5eb3f24c347..4bd91ab241f 100644
--- a/include/Support/hash_set
+++ b/include/Support/hash_set
@@ -39,5 +39,7 @@
 using HASH_NAMESPACE::hash_set;
 using HASH_NAMESPACE::hash;
 
+#include <Support/HashExtras.h>
+
 #endif