diff --git a/pcsx2/DEV9/pcap_io.h b/pcsx2/DEV9/pcap_io.h
index 701d858f9c..bf97051c07 100644
--- a/pcsx2/DEV9/pcap_io.h
+++ b/pcsx2/DEV9/pcap_io.h
@@ -14,7 +14,7 @@
  */
 
 #pragma once
-#if not defined(_WIN32)
+#if !defined(_WIN32)
 #include "pcap.h"
 #endif
 #include "net.h"