diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 8f6a8cdd002..b10ecb0adae 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2005-02-15  Andy Hutchinson  <HutchinsonAndy@netscape.net>
+
+	PR target/19924
+	* config/avr/avr.h (MODES_TIEABLE_P): Define to 1 to allow subreg
+	access optimization.
+
 2005-02-15  David Edelsohn  <edelsohn@gnu.org>
 	    Alan Modra  <amodra@bigpond.net.au>
 
diff --git a/gcc/config/avr/avr.h b/gcc/config/avr/avr.h
index e87ce43d5ea..42832e86e64 100644
--- a/gcc/config/avr/avr.h
+++ b/gcc/config/avr/avr.h
@@ -216,7 +216,7 @@ extern int avr_asm_only_p;
 
 #define HARD_REGNO_MODE_OK(REGNO, MODE) avr_hard_regno_mode_ok(REGNO, MODE)
 
-#define MODES_TIEABLE_P(MODE1, MODE2) 0
+#define MODES_TIEABLE_P(MODE1, MODE2) 1
 
 enum reg_class {
   NO_REGS,