diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index dbcdf5495c6..757d7625ac4 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2004-03-14  Richard Earnshaw  <rearnsha@arm.com>
+
+	* arm.h (EXTRA_CONSTRAINT_STR_ARM): Update comment.
+
 2004-03-13  Dara Hazeghi  <dhazeghi@yahoo.com>
 
 	* doc/install.texi: Note status of -fnew-ra.
diff --git a/gcc/config/arm/arm.h b/gcc/config/arm/arm.h
index 86c6f1403e2..666ce746907 100644
--- a/gcc/config/arm/arm.h
+++ b/gcc/config/arm/arm.h
@@ -1469,7 +1469,9 @@ enum reg_class
    `S' means any symbol that has the SYMBOL_REF_FLAG set or a CONSTANT_POOL
    address.  This means that the symbol is in the text segment and can be
    accessed without using a load.
-   'U' is an address valid for VFP load/store insns.  */
+   'U' Prefixes an extended memory constraint where:
+   'Uv' is an address valid for VFP load/store insns.  
+   'Uq' is an address valid for ldrsb.  */
 
 #define EXTRA_CONSTRAINT_STR_ARM(OP, C, STR)			\
   (((C) == 'Q') ? (GET_CODE (OP) == MEM				\