diff --git a/engines/tsage/sound.cpp b/engines/tsage/sound.cpp
index 9ee32e49275..b83b39dcf88 100644
--- a/engines/tsage/sound.cpp
+++ b/engines/tsage/sound.cpp
@@ -1357,7 +1357,7 @@ bool SoundManager::_sfInstallDriver(SoundDriver *driver) {
 	
 	sfManager()._installedDrivers.push_back(driver);
 	driver->_groupOffset = driver->getGroupData();
-	driver->_groupMask =  READ_LE_UINT32(driver->_groupOffset);
+	driver->_groupMask = driver->_groupOffset->groupMask;
 
 	_sfExtractGroupMask();
 	_sfRethinkSoundDrivers();