diff --git a/src/utils/time.hpp b/src/utils/time.hpp
index d8bed06ba..09c1c2394 100644
--- a/src/utils/time.hpp
+++ b/src/utils/time.hpp
@@ -41,7 +41,7 @@ public:
     {
         const struct tm *t = gmtime(&tt);
         char s[16];
-        strftime(s, sizeof(s), "%d.%m.%Y", t);
+        strftime(s, 16, "%d.%m.%Y", t);
         return s;
     }   // toString
     // ------------------------------------------------------------------------