diff --git a/Changes b/Changes
index 824cd3d65..45bbdc6ca 100644
--- a/Changes
+++ b/Changes
@@ -33,6 +33,8 @@ indicates the contributor was also the author of the fix; Thanks!
 
 **** Fix internal signal names containing control characters (broke in 3.680).
 
+**** Fix compile error on Ubuntu 8.10. [Christopher Boumenot]
+
 * Verilator 3.681 2008/11/12
 
 ***  Add SystemVerilog unique and priority case.
diff --git a/src/V3Hashed.cpp b/src/V3Hashed.cpp
index c9cfed454..dbe3a1810 100644
--- a/src/V3Hashed.cpp
+++ b/src/V3Hashed.cpp
@@ -33,6 +33,7 @@
 #include <algorithm>
 #include <iomanip>
 #include <map>
+#include <memory>
 
 #include "V3Global.h"
 #include "V3Hashed.h"