diff --git a/common.h b/common.h
index 380264c..fbe67af 100644
--- a/common.h
+++ b/common.h
@@ -44,7 +44,8 @@ static void __attribute__((unused)) free_string(char **ptr) {
 }
 
 static void __attribute__((unused)) psslerror(char *str) {
-    COMMON_LOG(LOG_ERR, "%s:", str);
+    if (str != NULL && strcmp(str, "") != 0)
+        COMMON_LOG(LOG_ERR, "%s:", str);
     unsigned long ssl_err;
     while ((ssl_err = ERR_get_error())) {
         COMMON_LOG(LOG_ERR, "ssl error: %lud:%s:%s:%s",