diff --git a/libs/main/io_devices/piethernet.cpp b/libs/main/io_devices/piethernet.cpp
index 0cd89f3e..9f628a70 100644
--- a/libs/main/io_devices/piethernet.cpp
+++ b/libs/main/io_devices/piethernet.cpp
@@ -1303,7 +1303,7 @@ PINetworkAddress PIEthernet::interfaceAddress(const PIString & interface_) {
 #else
 	struct ifreq ifr;
 	piZeroMemory(ifr);
-	strcpy(ifr.ifr_name, interface_.dataAscii());
+	strncpy(ifr.ifr_name, interface_.dataAscii(), sizeof(ifr.ifr_name));
 	int s = ::socket(AF_INET, SOCK_DGRAM, 0);
 	if (s != -1) {
 		ioctl(s, SIOCGIFADDR, &ifr);