diff --git a/pcsx2/DEV9/PacketReader/IP/UDP/DHCP/DHCP_Options.cpp b/pcsx2/DEV9/PacketReader/IP/UDP/DHCP/DHCP_Options.cpp
index 92d5c1ab0d..52f38136c2 100644
--- a/pcsx2/DEV9/PacketReader/IP/UDP/DHCP/DHCP_Options.cpp
+++ b/pcsx2/DEV9/PacketReader/IP/UDP/DHCP/DHCP_Options.cpp
@@ -66,7 +66,7 @@ namespace PacketReader::IP::UDP::DHCP
 		NetLib::WriteByteArray(buffer, offset, dnsServers.size() * 4, (u8*)&dnsServers[0]);
 	}
 
-	DHCPopHostName::DHCPopHostName(std::string name)
+	DHCPopHostName::DHCPopHostName(const std::string& name)
 	{
 		if (name.size() > 255)
 		{
@@ -298,7 +298,7 @@ namespace PacketReader::IP::UDP::DHCP
 		NetLib::WriteByteArray(buffer, offset, requests.size(), &requests[0]);
 	}
 
-	DHCPopMSGStr::DHCPopMSGStr(std::string msg)
+	DHCPopMSGStr::DHCPopMSGStr(const std::string& msg)
 	{
 		if (msg.size() > 255)
 		{
@@ -375,7 +375,7 @@ namespace PacketReader::IP::UDP::DHCP
 		NetLib::WriteUInt32(buffer, offset, ipRebindingTimeT2);
 	}
 
-	DHCPopClassID::DHCPopClassID(std::string id)
+	DHCPopClassID::DHCPopClassID(const std::string& id)
 	{
 		if (id.size() > 255)
 		{
diff --git a/pcsx2/DEV9/PacketReader/IP/UDP/DHCP/DHCP_Options.h b/pcsx2/DEV9/PacketReader/IP/UDP/DHCP/DHCP_Options.h
index 544bda8b2e..5b05143349 100644
--- a/pcsx2/DEV9/PacketReader/IP/UDP/DHCP/DHCP_Options.h
+++ b/pcsx2/DEV9/PacketReader/IP/UDP/DHCP/DHCP_Options.h
@@ -90,7 +90,7 @@ namespace PacketReader::IP::UDP::DHCP
 		//ASCII encoding
 		std::string hostName;
 
-		DHCPopHostName(std::string name);
+		DHCPopHostName(const std::string& name);
 		DHCPopHostName(u8* data, int offset); //Offset will include Kind and Len
 
 		virtual u8 GetLength() { return 2 + hostName.size(); }
@@ -276,7 +276,7 @@ namespace PacketReader::IP::UDP::DHCP
 		//ASCII encoding
 		std::string message;
 
-		DHCPopMSGStr(std::string msg);
+		DHCPopMSGStr(const std::string& msg);
 		DHCPopMSGStr(u8* data, int offset); //Offset will include Kind and Len
 
 		virtual u8 GetLength() { return 2 + message.size(); }
@@ -353,7 +353,7 @@ namespace PacketReader::IP::UDP::DHCP
 		//ASCII encoding
 		std::string classID;
 
-		DHCPopClassID(std::string id);
+		DHCPopClassID(const std::string& id);
 		DHCPopClassID(u8* data, int offset); //Offset will include Kind and Len
 
 		virtual u8 GetLength() { return 2 + classID.size(); }