diff --git a/src/network/networkd-address.c b/src/network/networkd-address.c
index 42d790887a..09615a4ce4 100644
--- a/src/network/networkd-address.c
+++ b/src/network/networkd-address.c
@@ -1825,7 +1825,7 @@ int config_parse_address(
                 r = in_addr_prefix_from_string_auto(rvalue, &f, &buffer, &prefixlen);
                 if (r >= 0)
                         log_syntax(unit, LOG_WARNING, filename, line, r,
-                                   "Address '%s' is specified without prefix length. Assuming the prefix length is %u."
+                                   "Address '%s' is specified without prefix length. Assuming the prefix length is %u. "
                                    "Please specify the prefix length explicitly.", rvalue, prefixlen);
         }
         if (r < 0) {