diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 9bcbd190a191..9eae7dd95157 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2000-05-12  Richard Henderson  <rth@cygnus.com>
+
+	* config/alpha/alpha.c (struct shadow_summary): Define
+	bitfields as type unsigned int.
+
 Sat May 13 00:09:59 2000  Denis Chertykov  <denisc@overta.ru>
 
 	* config/avr/t-avr: Added definition of FLOAT while generates
diff --git a/gcc/config/alpha/alpha.c b/gcc/config/alpha/alpha.c
index 89a08cfef693..f7030d1dd91d 100644
--- a/gcc/config/alpha/alpha.c
+++ b/gcc/config/alpha/alpha.c
@@ -4863,9 +4863,9 @@ alpha_output_lineno (stream, line)
 struct shadow_summary
 {
   struct {
-    unsigned long i     : 31;	/* Mask of int regs */
-    unsigned long fp    : 31;	/* Mask of fp regs */
-    unsigned long mem   :  1;	/* mem == imem | fpmem */
+    unsigned int i     : 31;	/* Mask of int regs */
+    unsigned int fp    : 31;	/* Mask of fp regs */
+    unsigned int mem   :  1;	/* mem == imem | fpmem */
   } used, defd;
 };