diff --git a/lib/des/test_rsa.c b/lib/des/test_rsa.c
index 1a89b3798..a6e880840 100644
--- a/lib/des/test_rsa.c
+++ b/lib/des/test_rsa.c
@@ -106,7 +106,7 @@ check_rsa(const unsigned char *in, size_t len, RSA *rsa, int padding)
 static int
 cb_func(int a, int b, BN_GENCB *c)
 {
-    return 0;
+    return 1;
 }
 
 /*