diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 146fa1a086f..608e48d8603 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2020-11-10  Gary Benson <gbenson@redhat.com>
+
+	* gdb.base/vla-optimized-out.exp (p sizeof (a)): Wrap supplied
+	regexp fragment in parentheses to prevent false matching.
+
 2020-11-10  Gary Benson <gbenson@redhat.com>
 
 	* gdb.base/vla-optimized-out.c (f1): Add __attribute__ ((weak)).
diff --git a/gdb/testsuite/gdb.base/vla-optimized-out.exp b/gdb/testsuite/gdb.base/vla-optimized-out.exp
index 66d1a131d95..203a82d06e3 100644
--- a/gdb/testsuite/gdb.base/vla-optimized-out.exp
+++ b/gdb/testsuite/gdb.base/vla-optimized-out.exp
@@ -42,7 +42,7 @@ proc vla_optimized_out {exe_suffix options} {
 	"printed optimized out vla"
 
     gdb_test "p sizeof (a)" \
-	" = $sizeof_result" \
+	" = ($sizeof_result)" \
 	"printed size of optimized out vla"
 
     # At lower optimisation levels, the upper bound of the array is