diff --git a/include/JSystem/JSupport/JSUInputStream.h b/include/JSystem/JSupport/JSUInputStream.h
index d0aa9ce5c..ac36bac18 100644
--- a/include/JSystem/JSupport/JSUInputStream.h
+++ b/include/JSystem/JSupport/JSUInputStream.h
@@ -67,7 +67,7 @@ public:
     }
 
     // TODO: return value probably wrong
-    /* 802DC298 */ s32 read(void*, s32);
+    s32 read(void*, s32);
 };  // Size = 0x8
 
 // move?
diff --git a/include/JSystem/JSupport/JSURandomInputStream.h b/include/JSystem/JSupport/JSURandomInputStream.h
index 4541db53d..49da046eb 100644
--- a/include/JSystem/JSupport/JSURandomInputStream.h
+++ b/include/JSystem/JSupport/JSURandomInputStream.h
@@ -16,9 +16,9 @@ public:
     /* vt[8] */ virtual s32 seekPos(s32, JSUStreamSeekFrom) = 0;
 
     // TODO: fix return types
-    /* 802DC370 */ s32 align(s32);
-    /* 802DC458 */ s32 peek(void*, s32);
-    /* 802DC4DC */ s32 seek(s32, JSUStreamSeekFrom);
+    s32 align(s32);
+    s32 peek(void*, s32);
+    s32 seek(s32, JSUStreamSeekFrom);
 };  // Size = 0x8
 
 #endif
diff --git a/src/JSystem/JSupport/JSUInputStream.cpp b/src/JSystem/JSupport/JSUInputStream.cpp
index 188d1098e..23eb6e9e1 100644
--- a/src/JSystem/JSupport/JSUInputStream.cpp
+++ b/src/JSystem/JSupport/JSUInputStream.cpp
@@ -5,9 +5,12 @@
 
 #include "JSystem/JSupport/JSUInputStream.h"
 #include "JSystem/JSupport/JSURandomInputStream.h"
+#include "dolphin/os/OS.h"
 
 /* 802BF3F4-802BF47C       .text __dt__14JSUInputStreamFv */
 JSUInputStream::~JSUInputStream() {
+    if (!isGood())
+        OSReport("JSUInputStream: occur error.\n");
 }
 
 /* 802BF47C-802BF4D4       .text read__14JSUInputStreamFPvl */