diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c0505f3419c..185da67d8f9 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2002-08-06  Jakub Jelinek  <jakub@redhat.com>
+
+	* config/i386/mmintrin.h (__m64): Make the type 64-bit aligned.
+
 2002-08-06  Jakub Jelinek  <jakub@redhat.com>
 
 	* config/i386/i386.c (x86_field_alignment): Apply min for all MODE_INT
diff --git a/gcc/config/i386/mmintrin.h b/gcc/config/i386/mmintrin.h
index 41dc4be6d6e..88e384f8011 100644
--- a/gcc/config/i386/mmintrin.h
+++ b/gcc/config/i386/mmintrin.h
@@ -31,7 +31,7 @@
 #define _MMINTRIN_H_INCLUDED
 
 /* The data type intended for user use.  */
-typedef unsigned long long __m64;
+typedef unsigned long long __m64 __attribute__ ((__aligned__ (8)));
 
 /* Internal data types for implementing the intrinsics.  */
 typedef int __v2si __attribute__ ((__mode__ (__V2SI__)));