diff --git a/Tier1/premake5.lua b/Tier1/premake5.lua
index 0e2e200c404..a4b4018dfc5 100644
--- a/Tier1/premake5.lua
+++ b/Tier1/premake5.lua
@@ -48,13 +48,14 @@ files {
 	"../src/tier1/utlsymbol.cpp"
 }
 
-if os.is "windows" then
+filter "system:windows"
 	links { "Ws2_32", "Rpcrt4" }
 	files "../src/tier1/processor_detect.cpp"
-else
+filter "system:linux"
+	buildoptions "-std=gnu++11"
+filter "system:not windows"
 	files {
 		"../src/tier1/processor_detect_linux.cpp",
-		"../src/tier1/qsort_s.cpp",
-		"../src/tier1/pathmatch.cpp"
+		"../src/tier1/qsort_s.cpp"
 	}
-end
+filter {}
diff --git a/premake5.lua b/premake5.lua
index 70d3174af3f..01f12a28789 100644
--- a/premake5.lua
+++ b/premake5.lua
@@ -5,9 +5,9 @@ local libLocations = {
 }
 
 local osDefinition = {
-	windows	= { "WIN32" },
-	macosx	= { "POSIX", "_POSIX", "GNUC", "OSX" },
-	linux	= { "POSIX", "_POSIX", "LINUX", "_LINUX", "GNUC" }
+	windows	= { "WIN32", "_DLL_EXT=dll" },
+	macosx	= { "POSIX", "_POSIX", "GNUC", "OSX", "_DLL_EXT=dylib", "NO_MALLOC_OVERRIDE" },
+	linux	= { "POSIX", "_POSIX", "LINUX", "_LINUX", "GNUC", "_DLL_EXT=so", "NO_MALLOC_OVERRIDE" }
 }
 
 libdirs(libLocations[os.get()])