diff --git a/testsuite/pkcs1-conv-test b/testsuite/pkcs1-conv-test
index 5ac3657f1211a17431f9611dd1bb1f2bfc9045bc..e1ce3dba1cb3c85b81887006faea4fcfd4d86e35 100755
--- a/testsuite/pkcs1-conv-test
+++ b/testsuite/pkcs1-conv-test
@@ -4,6 +4,8 @@ if [ -z "$srcdir" ] ; then
   srcdir=`pwd`
 fi
 
+[ -x ../tools/pkcs1-conv ] || exit 77
+
 # Private RSA key, generated by openssl
 ../tools/pkcs1-conv >testkey.priv <<EOF || exit 1
 -----BEGIN RSA PRIVATE KEY-----