diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 9e1ff854939..8f132c5d8bb 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2009-11-24  Ulrich Weigand  <Ulrich.Weigand@de.ibm.com>
+
+	* g++.dg/debug/dwarf2/anonname1.C: Escape backslash in
+	scan-assembler-not regular expression.
+
 2009-11-24  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/42142
diff --git a/gcc/testsuite/g++.dg/debug/dwarf2/anonname1.C b/gcc/testsuite/g++.dg/debug/dwarf2/anonname1.C
index c9da2d69866..b1cae214097 100644
--- a/gcc/testsuite/g++.dg/debug/dwarf2/anonname1.C
+++ b/gcc/testsuite/g++.dg/debug/dwarf2/anonname1.C
@@ -2,7 +2,7 @@
 // { dg-do compile }
 // { dg-options "-gdwarf-2 -dA -std=c++0x" }
 // { dg-final { scan-assembler-not "<anonymous" } }
-// { dg-final { scan-assembler-not "\._\[0-9\]" } }
+// { dg-final { scan-assembler-not "\\._\[0-9\]" } }
 // { dg-final { scan-assembler-not "\$_\[0-9\]" } }
 // { dg-final { scan-assembler-not "__anon_" } }