diff --git a/libultraship/libultraship/Resource.h b/libultraship/libultraship/Resource.h
index a1be208d0..4e4d73b29 100644
--- a/libultraship/libultraship/Resource.h
+++ b/libultraship/libultraship/Resource.h
@@ -30,10 +30,10 @@ namespace Ship
         Array            =   0x4F415252,     // OARR
         Text             =   0x4F545854,     // OTXT
         Blob             =   0x4F424C42,     // OBLB
-        Audio            =   'OAUD',
-        AudioSample      =   'OSMP',
-        AudioSoundFont   =   'OSFT',
-        AudioSequence    =   'OSEQ',
+        Audio            =   0x4F415544,     // OAUD
+        AudioSample      =   0x4F534D50,     // OSMP
+        AudioSoundFont   =   0x4F534654,     // OSFT
+        AudioSequence    =   0x4F534551,     // OSEQ
     };
 
     enum class DataType