diff --git a/libs/JSystem/include/JSystem/JAudio2/JASWaveInfo.h b/libs/JSystem/include/JSystem/JAudio2/JASWaveInfo.h
index 62110754d7..cac518836e 100644
--- a/libs/JSystem/include/JSystem/JAudio2/JASWaveInfo.h
+++ b/libs/JSystem/include/JSystem/JAudio2/JASWaveInfo.h
@@ -3,7 +3,7 @@
 
 #include <types.h>
 
-class JASWaveArc;
+struct JASWaveArc;
 
 #define WAVE_FORMAT_ADPCM4 0
 #define WAVE_FORMAT_ADPCM2 1