diff --git a/LEGO1/omni/src/stream/mxdsbuffer.cpp b/LEGO1/omni/src/stream/mxdsbuffer.cpp
index 106964b2..c79f4a07 100644
--- a/LEGO1/omni/src/stream/mxdsbuffer.cpp
+++ b/LEGO1/omni/src/stream/mxdsbuffer.cpp
@@ -526,6 +526,8 @@ MxU8* MxDSBuffer::FUN_100c6fa0(MxU8* p_data)
 		case FOURCC('M', 'x', 'H', 'd'):
 			current += (((MxU32*) current)[1] + 8);
 			break;
+		default:
+			return NULL;
 		}
 	}