diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 9104350ead0..9e457770135 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2000-07-21  David Edelsohn  <edelsohn@gnu.org>
+
+	* rs6000.h (SIZE_TYPE): Define.
+
 2000-07-21  Mark Mitchell  <mark@codesourcery.com>
 
 	* ssa.c (rename_insn_1): Don't rename registers that are
diff --git a/gcc/config/rs6000/rs6000.h b/gcc/config/rs6000/rs6000.h
index 9b3de41fcbd..973aeaabc6a 100644
--- a/gcc/config/rs6000/rs6000.h
+++ b/gcc/config/rs6000/rs6000.h
@@ -504,6 +504,9 @@ extern int rs6000_debug_arg;		/* debug argument handling */
 /* Type used for ptrdiff_t, as a string used in a declaration.  */
 #define PTRDIFF_TYPE "int"
 
+/* Type used for size_t, as a string used in a declaration.  */
+#define SIZE_TYPE "long unsigned int"
+
 /* Type used for wchar_t, as a string used in a declaration.  */
 #define WCHAR_TYPE "short unsigned int"