diff --git a/testprof/x86_prof.c b/testprof/x86_prof.c
index 2d4700f..fe203a0 100644
--- a/testprof/x86_prof.c
+++ b/testprof/x86_prof.c
@@ -322,7 +322,9 @@ static unsigned long my_test_rng(unsigned char *buf, unsigned long len,
 
 void reg_algs(void)
 {
+#ifdef LTC_PRNG_ENABLE_LTC_RNG
   unsigned long before;
+#endif
   int err;
 
   atexit(_unregister_all);