diff --git a/Alc/backends/opensl.c b/Alc/backends/opensl.c
index a010f9b7..1a104029 100644
--- a/Alc/backends/opensl.c
+++ b/Alc/backends/opensl.c
@@ -152,9 +152,15 @@ static const char *res_str(SLresult result)
         case SL_RESULT_UNKNOWN_ERROR: return "Unknown error";
         case SL_RESULT_OPERATION_ABORTED: return "Operation aborted";
         case SL_RESULT_CONTROL_LOST: return "Control lost";
+#ifdef SL_RESULT_READONLY
         case SL_RESULT_READONLY: return "ReadOnly";
+#endif
+#ifdef SL_RESULT_ENGINEOPTION_UNSUPPORTED
         case SL_RESULT_ENGINEOPTION_UNSUPPORTED: return "Engine option unsupported";
+#endif
+#ifdef SL_RESULT_SOURCE_SINK_INCOMPATIBLE
         case SL_RESULT_SOURCE_SINK_INCOMPATIBLE: return "Source/Sink incompatible";
+#endif
     }
     return "Unknown error code";
 }
@@ -293,7 +299,8 @@ static ALCboolean opensl_reset_playback(ALCdevice *Device)
     format_pcm.bitsPerSample = BytesFromDevFmt(Device->FmtType) * 8;
     format_pcm.containerSize = format_pcm.bitsPerSample;
     format_pcm.channelMask = GetChannelMask(Device->FmtChans);
-    format_pcm.endianness = SL_BYTEORDER_NATIVE;
+    format_pcm.endianness = IS_LITTLE_ENDIAN ? SL_BYTEORDER_LITTLEENDIAN :
+                                               SL_BYTEORDER_BIGENDIAN;
 
     audioSrc.pLocator = &loc_bufq;
     audioSrc.pFormat = &format_pcm;