diff --git a/recorder.c b/recorder.c
index 795702a..6fa4696 100644
--- a/recorder.c
+++ b/recorder.c
@@ -1948,7 +1948,8 @@ int main(int argc, char **argv)
 			exit(2);
 		}
 #ifdef WITH_SHARES
-		olog(LOG_INFO, "HTTP prefix is %s", ud->http_prefix);
+		olog(LOG_INFO, "HTTP prefix is %s",
+			ud->http_prefix ? ud->http_prefix : "unset");
 # endif /* WITH_SHARES */
 
 	}