diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 28ee9f739fc..5e0c1e6244d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2012-02-24  Georg-Johann Lay  <avr@gjlay.de>
+
+	PR target/52261
+	* config/avr/avr.c (avr_out_movhi_mr_r_xmega): Use base
+	to test for unusedness in st X addressing.
+
 2012-02-24  Richard Guenther  <rguenther@suse.de>
 
 	PR middle-end/52361
diff --git a/gcc/config/avr/avr.c b/gcc/config/avr/avr.c
index d4cfaef0ca0..8959553f0fa 100644
--- a/gcc/config/avr/avr.c
+++ b/gcc/config/avr/avr.c
@@ -4019,8 +4019,8 @@ avr_out_movhi_mr_r_xmega (rtx insn, rtx op[], int *plen)
       else
         avr_asm_len ("st X+,%A1" CR_TAB
                      "st X,%B1", op, plen, -2);
-            
-      return reg_unused_after (insn, src)
+
+      return reg_unused_after (insn, base)
         ? ""
         : avr_asm_len ("sbiw r26,1", op, plen, 1);
     }