diff --git a/core/ExtensionSys.cpp b/core/ExtensionSys.cpp
index 9212a3bb..32f352ee 100644
--- a/core/ExtensionSys.cpp
+++ b/core/ExtensionSys.cpp
@@ -74,7 +74,7 @@ CLocalExtension::CLocalExtension(const char *filename)
 #elif SOURCE_ENGINE == SE_ORANGEBOX
 		"extensions/auto.2.ep2/%s",
 #elif SOURCE_ENGINE == SE_ORANGEBOXVALVE
-		"extensions/auto.2.ep2valve",
+		"extensions/auto.2.ep2valve/%s",
 #elif SOURCE_ENGINE == SE_DARKMESSIAH
 		"extensions/auto.2.darkm/%s",
 #else
diff --git a/extensions/bintools/CallWrapper.cpp b/extensions/bintools/CallWrapper.cpp
index 50150861..56b22da4 100644
--- a/extensions/bintools/CallWrapper.cpp
+++ b/extensions/bintools/CallWrapper.cpp
@@ -180,7 +180,7 @@ const SourceHook::PassInfo * CallWrapper::GetSHParamInfo(unsigned int num)
 
 unsigned int CallWrapper::GetParamOffset(unsigned int num)
 {
-	assert(num <= GetParamCount() && num > 0);
+	assert(num < GetParamCount() && num >= 0);
 
 	return m_Params[num].offset;
 }
diff --git a/extensions/bintools/msvc9/bintools.vcproj b/extensions/bintools/msvc9/bintools.vcproj
index 5507a138..477155bb 100644
--- a/extensions/bintools/msvc9/bintools.vcproj
+++ b/extensions/bintools/msvc9/bintools.vcproj
@@ -991,6 +991,10 @@
 			Filter="rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav"
 			UniqueIdentifier="{C06F7BFF-18EE-4994-8572-D6383011354B}"
 			>
+			<File
+				RelativePath="..\..\..\public\extensions\IBinTools.h"
+				>
+			</File>
 			<File
 				RelativePath="..\version.rc"
 				>
@@ -1070,10 +1074,6 @@
 			Name="Interfaces"
 			UniqueIdentifier="{7DE81EA3-99D9-4f34-823A-B314791F3514}"
 			>
-			<File
-				RelativePath="..\..\..\public\extensions\IBinTools.h"
-				>
-			</File>
 		</Filter>
 	</Files>
 	<Globals>
diff --git a/gamedata/sdktools.games/master.games.txt b/gamedata/sdktools.games/master.games.txt
index 3d1ea5a6..d497f08f 100644
--- a/gamedata/sdktools.games/master.games.txt
+++ b/gamedata/sdktools.games/master.games.txt
@@ -17,7 +17,7 @@
 	/* Special OB engine for TF/DoD:S only */
 	"engine.ep2valve.txt"
 	{
-		engine"		"orangebox_valve"
+		"engine"	"orangebox_valve"
 	}
 	
 	"engine.ep1.txt"
diff --git a/loader/loader.cpp b/loader/loader.cpp
index d94dc71a..244bcc5b 100644
--- a/loader/loader.cpp
+++ b/loader/loader.cpp
@@ -48,6 +48,8 @@
 		return (c == '/' || c == '\\');
 	}
 	#include <Windows.h>
+	#define TF_PATH					"\\tf\\"
+	#define DOD_PATH				"\\dod\\"
 #else
 	#define DLL_EXPORT				extern "C" __attribute__((visibility("default")))
 	#define openlib(lib)			dlopen(lib, RTLD_NOW)
@@ -61,6 +63,8 @@
 		return (c == '/');
 	}
 	#include <dlfcn.h>
+	#define TF_PATH					"/tf/"
+	#define DOD_PATH				"/dod/"
 #endif
 
 #define METAMOD_API_MAJOR			2
@@ -213,7 +217,7 @@ DLL_EXPORT METAMOD_PLUGIN *CreateInterface_MMS(const MetamodVersionInfo *mvi, co
 		}
 	case SOURCE_ENGINE_ORANGEBOX:
 		{
-			if (strncmp(mli->pl_path, "tf/", 3) == 0 || strncmp(mli->pl_path, "dod/", 4) == 0)
+			if (strstr(mli->pl_path, TF_PATH) || strstr(mli->pl_path, DOD_PATH))
 			{
 				filename = FILENAME_1_6_EP2VALVE;
 				break;