diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index f74e54f02ed2..d50afd3c0c82 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,8 @@
+2010-09-19  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	* src/hash_bytes.cc: Compile load_bytes and shift_mix only when
+	__SIZEOF_SIZE_T__ == 8.
+
 2010-09-17  Luc Hermitte  <hermitte@free.fr>
 	    Paolo Carlini  <paolo.carlini@oracle.com>
 
diff --git a/libstdc++-v3/src/hash_bytes.cc b/libstdc++-v3/src/hash_bytes.cc
index 5dfa1eec1d66..d14ad41a9fd9 100644
--- a/libstdc++-v3/src/hash_bytes.cc
+++ b/libstdc++-v3/src/hash_bytes.cc
@@ -45,6 +45,7 @@ namespace
     return result;
   }
 
+#if __SIZEOF_SIZE_T__ == 8
   // Loads n bytes, where 1 <= n < 8.
   inline std::size_t
   load_bytes(const char* p, int n)
@@ -60,6 +61,7 @@ namespace
   inline std::size_t
   shift_mix(std::size_t v)
   { return v ^ (v >> 47);}
+#endif
 }
 
 namespace std