diff --git a/src/lib/arch/IArchPlugin.h b/src/lib/arch/IArchPlugin.h
index e864bc4d..f6ae4637 100644
--- a/src/lib/arch/IArchPlugin.h
+++ b/src/lib/arch/IArchPlugin.h
@@ -70,7 +70,8 @@ public:
 	*/
 	virtual void*		invoke(const char* plugin,
 							const char* command,
-							void** args) = 0;
+							void** args,
+							void* library = NULL) = 0;
 
 	//@}
 
diff --git a/src/lib/arch/unix/ArchPluginUnix.cpp b/src/lib/arch/unix/ArchPluginUnix.cpp
index e13e9472..ce81946f 100644
--- a/src/lib/arch/unix/ArchPluginUnix.cpp
+++ b/src/lib/arch/unix/ArchPluginUnix.cpp
@@ -83,21 +83,20 @@ ArchPluginUnix::load()
 		}
 
 		String filename = synergy::string::removeFileExt(*it);
-		m_pluginTable.insert(std::make_pair(filename, library));
-
 		size_t pos = filename.find("lib");
 		String pluginName = filename.substr(pos + 3);
-		char* version = (char*)invoke(filename.c_str(), "version", NULL);
+		char* version = (char*)invoke(filename.c_str(), "version", NULL, library);
 		String expectedVersion(pluginVersion(pluginName.c_str()));
+		
 		if (version != NULL && expectedVersion.compare(version) == 0) {
 			LOG((CLOG_DEBUG "loaded plugin: %s (%s)", (*it).c_str(), version));
+			m_pluginTable.insert(std::make_pair(filename, library));
 		}
 		else {
 			LOG((CLOG_WARN "plugin version doesn't match"));
 			LOG((CLOG_DEBUG "expected plugin version: %s actual plugin version: %s",
 					expectedVersion.c_str(), version));
 			LOG((CLOG_WARN "skip plugin: %s", (*it).c_str()));
-			m_pluginTable.erase(filename);
 			dlclose(library);
 		}
 	}
@@ -166,26 +165,37 @@ void*
 ArchPluginUnix::invoke(
 	const char* plugin,
 	const char* command,
-	void** args)
+	void** args,
+	void* library)
 {
-	PluginTable::iterator it;
-	it = m_pluginTable.find(plugin);
-	if (it != m_pluginTable.end()) {
-		invokeFunc invokePlugin = (invokeFunc)dlsym(it->second, "invoke");
-		void* result = NULL;
-		if (invokePlugin != NULL) {
-			result = invokePlugin(command, args);
+	void* lib = NULL;
+
+	if (library == NULL) {
+		PluginTable::iterator it;
+		it = m_pluginTable.find(plugin);
+		if (it != m_pluginTable.end()) {
+			lib = it->second;
 		}
 		else {
-			LOG((CLOG_DEBUG "no invoke function in %s", it->first.c_str()));
+			LOG((CLOG_DEBUG "invoke command failed, plugin: %s command: %s",
+					plugin, command));
+			return NULL;
 		}
-		return result;
 	}
 	else {
-		LOG((CLOG_DEBUG "invoke command failed, plugin: %s command: %s",
-				plugin, command));
-		return NULL;
+		lib = library;
 	}
+	
+	invokeFunc invokePlugin = (invokeFunc)dlsym(lib, "invoke");
+	void* result = NULL;
+	if (invokePlugin != NULL) {
+		result = invokePlugin(command, args);
+	}
+	else {
+		LOG((CLOG_DEBUG "no invoke function in %s", plugin));
+	}
+
+	return result;
 }
 
 String
diff --git a/src/lib/arch/unix/ArchPluginUnix.h b/src/lib/arch/unix/ArchPluginUnix.h
index 5438dffb..894c675b 100644
--- a/src/lib/arch/unix/ArchPluginUnix.h
+++ b/src/lib/arch/unix/ArchPluginUnix.h
@@ -38,7 +38,8 @@ public:
 	bool				exists(const char* name);
 	virtual void*		invoke(const char* pluginName,
 							const char* functionName,
-							void** args);
+							void** args,
+							void* library = NULL);
 
  private:
 	String				getPluginsDir();
diff --git a/src/lib/arch/win32/ArchPluginWindows.cpp b/src/lib/arch/win32/ArchPluginWindows.cpp
index 81fd7a32..63a1cf41 100644
--- a/src/lib/arch/win32/ArchPluginWindows.cpp
+++ b/src/lib/arch/win32/ArchPluginWindows.cpp
@@ -70,19 +70,18 @@ ArchPluginWindows::load()
 		void* lib = reinterpret_cast<void*>(library);
 
 		String pluginName = synergy::string::removeFileExt(*it);
-		m_pluginTable.insert(std::make_pair(pluginName, lib));
-
-		char* version = (char*)invoke(pluginName.c_str(), "version", NULL);
+		char* version = (char*)invoke(pluginName.c_str(), "version", NULL, lib);
 		String expectedVersion(pluginVersion(pluginName.c_str()));
+
 		if (version != NULL && expectedVersion.compare(version) == 0) {
 			LOG((CLOG_DEBUG "loaded plugin: %s (%s)", (*it).c_str(), version));
+			m_pluginTable.insert(std::make_pair(pluginName, lib));
 		}
 		else {
 			LOG((CLOG_WARN "plugin version doesn't match"));
 			LOG((CLOG_DEBUG "expected plugin version: %s actual plugin version: %s",
 				expectedVersion.c_str(), version));
 			LOG((CLOG_WARN "skip plugin: %s", (*it).c_str()));
-			m_pluginTable.erase(pluginName);
 			FreeLibrary(library);
 		}
 	}
@@ -158,28 +157,37 @@ void*
 ArchPluginWindows::invoke(
 	const char* plugin,
 	const char* command,
-	void** args)
+	void** args,
+	void* library)
 {
-	PluginTable::iterator it;
-	it = m_pluginTable.find(plugin);
-	if (it != m_pluginTable.end()) {
-		HINSTANCE lib = reinterpret_cast<HINSTANCE>(it->second);
-		invokeFunc invokePlugin = (invokeFunc)GetProcAddress(lib, "invoke");
-		void* result = NULL;
-		if (invokePlugin != NULL) {
-			 result = invokePlugin(command, args);
+	HINSTANCE lib = NULL;
+
+	if (library == NULL) {
+		PluginTable::iterator it;
+		it = m_pluginTable.find(plugin);
+		if (it != m_pluginTable.end()) {
+			lib = reinterpret_cast<HINSTANCE>(it->second);
 		}
 		else {
-			LOG((CLOG_DEBUG "no invoke function in %s", it->first.c_str()));
+			LOG((CLOG_DEBUG "invoke command failed, plugin: %s command: %s",
+					plugin, command));
+			return NULL;
 		}
-
-		return result;
 	}
 	else {
-		LOG((CLOG_DEBUG "invoke command failed, plugin: %s command: %s",
-				plugin, command));
-		return NULL;
+		lib = reinterpret_cast<HINSTANCE>(library);
 	}
+
+	invokeFunc invokePlugin = (invokeFunc)GetProcAddress(lib, "invoke");
+	void* result = NULL;
+	if (invokePlugin != NULL) {
+		result = invokePlugin(command, args);
+	}
+	else {
+		LOG((CLOG_DEBUG "no invoke function in %s", plugin));
+	}
+
+	return result;
 }
 
 void
diff --git a/src/lib/arch/win32/ArchPluginWindows.h b/src/lib/arch/win32/ArchPluginWindows.h
index fd325dfe..50f77a64 100644
--- a/src/lib/arch/win32/ArchPluginWindows.h
+++ b/src/lib/arch/win32/ArchPluginWindows.h
@@ -41,7 +41,8 @@ public:
 	bool				exists(const char* name);
 	void*				invoke(const char* pluginName,
 							const char* functionName,
-							void** args);
+							void** args,
+							void* library = NULL);
 
 private:
 	void				getFilenames(const String& pattern, std::vector<String>& filenames);