1 files changed, 1 insertions, 1 deletions

diff --git a/entropy.c b/entropy.c
index 8b705397f..a82166258 100644
--- a/entropy.c
+++ b/entropy.c
@@ -157,7 +157,7 @@ init_rng(void)
          */
         if ((SSLeay() ^ OPENSSL_VERSION_NUMBER) & ~0xff0L)
                 fatal("OpenSSL version mismatch. Built against %lx, you "
-                    "have %lx", OPENSSL_VERSION_NUMBER, SSLeay());
+                    "have %lx", (u_long)OPENSSL_VERSION_NUMBER, SSLeay());
 
 #ifndef OPENSSL_PRNG_ONLY
         original_uid = getuid();