diff --git a/other/bootstrap_daemon/tox-bootstrapd.c b/other/bootstrap_daemon/tox-bootstrapd.c
index 7e78da4e1..1b69014c7 100644
--- a/other/bootstrap_daemon/tox-bootstrapd.c
+++ b/other/bootstrap_daemon/tox-bootstrapd.c
@@ -161,7 +161,12 @@ void parse_tcp_relay_ports_config(config_t *cfg, uint16_t **tcp_relay_ports, int
         }
 
         // the loop above skips invalid ports, so we adjust the allocated memory size
-        *tcp_relay_ports = realloc(*tcp_relay_ports, (*tcp_relay_port_count) * sizeof(uint16_t));
+        if ((*tcp_relay_port_count) > 0) {
+            *tcp_relay_ports = realloc(*tcp_relay_ports, (*tcp_relay_port_count) * sizeof(uint16_t));
+        } else {
+            free(*tcp_relay_port);
+            *tcp_relay_port = NULL;
+        }
 
         return;
     }
@@ -210,8 +215,11 @@ void parse_tcp_relay_ports_config(config_t *cfg, uint16_t **tcp_relay_ports, int
     }
 
     // the loop above skips invalid ports, so we adjust the allocated memory size
-    if ((*tcp_relay_port_count) * sizeof(uint16_t) > 0) {
+    if ((*tcp_relay_port_count) > 0) {
         *tcp_relay_ports = realloc(*tcp_relay_ports, (*tcp_relay_port_count) * sizeof(uint16_t));
+    } else {
+        free(*tcp_relay_port);
+        *tcp_relay_port = NULL;
     }
 }