diff --git a/engines/sci/resource.cpp b/engines/sci/resource.cpp
index 6501fa27b62..e9a88df541b 100644
--- a/engines/sci/resource.cpp
+++ b/engines/sci/resource.cpp
@@ -2079,10 +2079,9 @@ void ResourceManager::detectSciVersion() {
 		} else if (!heaps->empty()) {
 			s_sciVersion = SCI_VERSION_2_1;
 			return;
-// Enable SCI3 games by uncommenting the below lines
-//		} else {
-//			s_sciVersion = SCI_VERSION_3;
-//			return;
+		} else {
+			s_sciVersion = SCI_VERSION_3;
+			return;
 		}
 	}
 
@@ -2170,9 +2169,6 @@ void ResourceManager::detectSciVersion() {
 	case kResVersionSci11:
 		s_sciVersion = SCI_VERSION_1_1;
 		return;
-	case kResVersionSci3:
-		s_sciVersion = SCI_VERSION_3;
-		return;
 	default:
 		s_sciVersion = SCI_VERSION_NONE;
 		error("detectSciVersion(): Unable to detect the game's SCI version");
diff --git a/engines/sci/sound/drivers/midi.cpp b/engines/sci/sound/drivers/midi.cpp
index 66117534202..a8f20dc0e29 100644
--- a/engines/sci/sound/drivers/midi.cpp
+++ b/engines/sci/sound/drivers/midi.cpp
@@ -893,10 +893,16 @@ int MidiPlayer_Midi::open(ResourceManager *resMan) {
 			res = resMan->findResource(ResourceId(kResourceTypePatch, 1), 0);
 
 			if (res) {
-				if (!isMt32GmPatch(res->data, res->size))
+				if (!isMt32GmPatch(res->data, res->size)) {
 					mapMt32ToGm(res->data, res->size);
-				else
-					error("MT-32 patch has wrong type");
+				} else {
+					if (getSciVersion() <= SCI_VERSION_2_1) {
+						error("MT-32 patch has wrong type");
+					} else {
+						// Happens in the SCI3 interactive demo of Lighthouse
+						warning("TODO: Ignoring new SCI3 type of MT-32 patch for now (size = %d)", res->size);
+					}
+				}
 			} else {
 				// No MT-32 patch present, try to read from MT32.DRV
 				Common::File f;