diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 7c8aad31abd..5a7c3f1ac01 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2011-03-08  Mikael Pettersson  <mikpe@it.uu.se>
+
+	PR testsuite/47954
+	* gcc.dg/tree-ssa/ssa-ccp-33.c: Use __alignof__ not
+	sizeof to compute alignment.
+
 2011-03-08  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/48022
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-33.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-33.c
index 5a890cae69f..753676994e4 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-33.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-33.c
@@ -8,7 +8,7 @@ void foo(int n)
   int *p;
   for (p = a; n != 0; --n, ++p)
     ;
-  if ((__SIZE_TYPE__)p & (sizeof (int) - 1))
+  if ((__SIZE_TYPE__)p & (__alignof__ (int) - 1))
     link_error ();
 }
 int main()