diff --git a/lib/krb5/test_pknistkdf.c b/lib/krb5/test_pknistkdf.c
index ca78e3c04..9fa447402 100644
--- a/lib/krb5/test_pknistkdf.c
+++ b/lib/krb5/test_pknistkdf.c
@@ -229,7 +229,7 @@ test_dh2key(krb5_context context, int i, struct testcase *c)
     AlgorithmIdentifier ai;
     size_t size;
 
-    memset(&ticket, 0, sizeof(&ticket));
+    memset(&ticket, 0, sizeof(ticket));
 
     ai.algorithm = *c->oid;
     ai.parameters = NULL;