diff --git a/memcheck/tests/amd64/insn-pcmpistri.vgtest b/memcheck/tests/amd64/insn-pcmpistri.vgtest
index 225c725a1..5bbe79f7c 100644
--- a/memcheck/tests/amd64/insn-pcmpistri.vgtest
+++ b/memcheck/tests/amd64/insn-pcmpistri.vgtest
@@ -1,2 +1,3 @@
+prereq: test -e ./insn-pcmpistri
 prog: insn-pcmpistri
 vgopts: -q