diff --git a/extensions/dhooks/natives.cpp b/extensions/dhooks/natives.cpp
index e1ace0b4..8757e831 100644
--- a/extensions/dhooks/natives.cpp
+++ b/extensions/dhooks/natives.cpp
@@ -256,6 +256,15 @@ cell_t Native_SetFromConf(IPluginContext *pContext, const cell_t *params)
 	setup->funcAddr = addr;
 	setup->offset = offset;
 
+	if (addr == nullptr)
+	{
+		setup->hookMethod = Virtual;
+	}
+	else
+	{
+		setup->hookMethod = Detour;
+	}
+
 	return 1;
 }
 
@@ -282,6 +291,13 @@ cell_t Native_AddParam(IPluginContext *pContext, const cell_t *params)
 		info.flags = PASSFLAG_BYVAL;
 	}
 
+	// DynamicDetours doesn't expose the passflags concept like SourceHook.
+	// See if we're trying to set some invalid flags on detour arguments.
+	if(setup->hookMethod == Detour && (info.flags & ~PASSFLAG_BYVAL) > 0)
+	{
+		return pContext->ThrowNativeError("Pass flags are only supported for virtual hooks.");
+	}
+
 	if (params[0] >= 5)
 	{
 		PluginRegister custom_register = (PluginRegister)params[5];
diff --git a/extensions/dhooks/signatures.cpp b/extensions/dhooks/signatures.cpp
index e5ddd8b9..45b673cc 100644
--- a/extensions/dhooks/signatures.cpp
+++ b/extensions/dhooks/signatures.cpp
@@ -376,6 +376,20 @@ SMCResult SignatureGameConfig::ReadSMC_LeavingSection(const SMCStates *states)
 			return SMCResult_HaltFail;
 		}
 
+		if (!g_CurrentSignature->offset.length())
+		{
+			// DynamicDetours doesn't expose the passflags concept like SourceHook.
+			// See if we're trying to set some invalid flags on detour arguments.
+			for (auto &arg : g_CurrentSignature->args)
+			{
+				if ((arg.info.flags & ~PASSFLAG_BYVAL) > 0)
+				{
+					smutils->LogError(myself, "Function \"%s\" uses unsupported pass flags in argument \"%s\". Flags are only supported for virtual hooks: line: %i col: %i", g_CurrentFunctionName.c_str(), arg.name.c_str(), states->line, states->col);
+					return SMCResult_HaltFail;
+				}
+			}
+		}
+
 		// Save this function signature in our cache.
 		signatures_.insert(g_CurrentFunctionName.c_str(), g_CurrentSignature);
 		g_CurrentFunctionName = "";
diff --git a/extensions/dhooks/vhook.h b/extensions/dhooks/vhook.h
index 3340049c..6146d1ad 100644
--- a/extensions/dhooks/vhook.h
+++ b/extensions/dhooks/vhook.h
@@ -225,6 +225,11 @@ public:
 	DHooksInfo *dg;
 };
 
+enum HookMethod {
+	Virtual,
+	Detour
+};
+
 class HookSetup
 {
 public:
@@ -238,6 +243,7 @@ public:
 		this->offset = offset;
 		this->funcAddr = nullptr;
 		this->callback = callback;
+		this->hookMethod = Virtual;
 	};
 	HookSetup(ReturnType returnType, unsigned int returnFlag, CallingConvention callConv, ThisPointerType thisType, void *funcAddr)
 	{
@@ -249,6 +255,7 @@ public:
 		this->offset = -1;
 		this->funcAddr = funcAddr;
 		this->callback = nullptr;
+		this->hookMethod = Detour;
 	};
 	~HookSetup(){};
 
@@ -266,6 +273,7 @@ public:
 	int offset;
 	void *funcAddr;
 	IPluginFunction *callback;
+	HookMethod hookMethod;
 };
 
 class DHooksManager