diff --git a/sim/rx/ChangeLog b/sim/rx/ChangeLog
index 4da59659d4..8728ebf037 100644
--- a/sim/rx/ChangeLog
+++ b/sim/rx/ChangeLog
@@ -1,3 +1,9 @@
+2010-09-29  Kevin Buettner  <kevinb@redhat.com>
+
+	* mem.c (rx_mem_ptr): When invalidating the decode cache, account
+	for the fact that the instruction decoder never uses swapped
+	addresses.
+
 2010-09-29  Nick Clifton  <nickc@redhat.com>
 
 	* rx.c (decode_opcode: RXO_int): Only break out of the emulation
diff --git a/sim/rx/mem.c b/sim/rx/mem.c
index 7405518e3a..3a976cb855 100644
--- a/sim/rx/mem.c
+++ b/sim/rx/mem.c
@@ -104,13 +104,19 @@ rx_mem_ptr (unsigned long address, enum mem_ptr_action action)
 
   if (action == MPA_WRITING)
     {
+      int pto_dc;
       if (ptr[pt1][pt2][pto] == MC_PUSHED_PC)
 	execution_error (SIM_ERR_CORRUPT_STACK, address);
       ptr[pt1][pt2][pto] = MC_DATA;
-      if (ptdc[pt1][pt2][pto])
+
+      /* The instruction decoder doesn't store it's decoded instructions
+         at word swapped addresses.  Therefore, when clearing the decode
+	 cache, we have to account for that here.  */
+      pto_dc = pto ^ (rx_big_endian ? 3 : 0);
+      if (ptdc[pt1][pt2][pto_dc])
 	{
-	  free (ptdc[pt1][pt2][pto]);
-	  ptdc[pt1][pt2][pto] = NULL;
+	  free (ptdc[pt1][pt2][pto_dc]);
+	  ptdc[pt1][pt2][pto_dc] = NULL;
 	}
     }