diff --git a/scripts/src/osd/sdl_cfg.lua b/scripts/src/osd/sdl_cfg.lua
index e63fe3387a5..e746dcf40df 100644
--- a/scripts/src/osd/sdl_cfg.lua
+++ b/scripts/src/osd/sdl_cfg.lua
@@ -12,6 +12,7 @@ if _OPTIONS["targetos"]=="windows" then
 		"USE_XINPUT=0",
 		"USE_OPENGL=1",
 		"USE_QTDEBUG=1",
+		"SDLMAME_NET_PCAP",
 	}
 
 	buildoptions {
@@ -30,6 +31,7 @@ if _OPTIONS["targetos"]=="linux" then
 		"USE_XINPUT=0",
 		"USE_OPENGL=1",
 		"USE_QTDEBUG=1",
+		"SDLMAME_NET_TAPTUN",
 	}
 
 	if (USE_BGFX == 1) then
@@ -53,6 +55,7 @@ if _OPTIONS["targetos"]=="macosx" then
 		"USE_XINPUT=0",
 		"USE_OPENGL=1",
 		"USE_QTDEBUG=0",
+		"SDLMAME_NET_PCAP",
 	}
 
 	if (USE_BGFX == 1) then
diff --git a/scripts/src/osd/windows_cfg.lua b/scripts/src/osd/windows_cfg.lua
index 667a4dcf383..90944ecbb4f 100644
--- a/scripts/src/osd/windows_cfg.lua
+++ b/scripts/src/osd/windows_cfg.lua
@@ -10,5 +10,6 @@ defines {
 	"USE_QTDEBUG=0",
 	"USE_OPENGL=1",
 	"USE_DISPATCH_GL=1",
-	"DIRECTINPUT_VERSION=0x0800"
+	"DIRECTINPUT_VERSION=0x0800",
+	"SDLMAME_NET_PCAP",
 }