diff --git a/src/mem/ruby/common/Address.cc b/src/mem/ruby/common/Address.cc
index edb4177387..af8ddb4372 100644
--- a/src/mem/ruby/common/Address.cc
+++ b/src/mem/ruby/common/Address.cc
@@ -58,19 +58,6 @@ maskLowOrderBits(Addr addr, unsigned int number)
   return (addr & mask);
 }
 
-Addr
-maskHighOrderBits(Addr addr, unsigned int number)
-{
-    Addr mask;
-
-    if (number >= ADDRESS_WIDTH - 1) {
-        mask = ~0;
-    } else {
-        mask = (Addr)~0 >> number;
-    }
-    return (addr & mask);
-}
-
 Addr
 shiftLowOrderBits(Addr addr, unsigned int number)
 {
diff --git a/src/mem/ruby/common/Address.hh b/src/mem/ruby/common/Address.hh
index 17490c4489..6aed96a1bb 100644
--- a/src/mem/ruby/common/Address.hh
+++ b/src/mem/ruby/common/Address.hh
@@ -40,7 +40,6 @@ const uint32_t ADDRESS_WIDTH = 64; // address width in bytes
 // selects bits inclusive
 Addr bitSelect(Addr addr, unsigned int small, unsigned int big);
 Addr maskLowOrderBits(Addr addr, unsigned int number);
-Addr maskHighOrderBits(Addr addr, unsigned int number);
 Addr shiftLowOrderBits(Addr addr, unsigned int number);
 Addr getOffset(Addr addr);
 Addr makeLineAddress(Addr addr);