diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 24766f8621f0..96c684b942b1 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2008-07-01  Steve Ellcey  <sje@cup.hp.com>
+
+	* config/ia64/ia64.c (ia64_cannot_force_const_mem): Do not allow
+	RFmode constants.
+
 2008-07-01  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.c (ix86_build_signbit_mask): Generate TImode and
diff --git a/gcc/config/ia64/ia64.c b/gcc/config/ia64/ia64.c
index d1928f6b3c74..de39ab129468 100644
--- a/gcc/config/ia64/ia64.c
+++ b/gcc/config/ia64/ia64.c
@@ -781,6 +781,8 @@ ia64_legitimate_constant_p (rtx x)
 static bool
 ia64_cannot_force_const_mem (rtx x)
 {
+  if (GET_MODE (x) == RFmode)
+    return true;
   return tls_symbolic_operand_type (x) != 0;
 }