diff --git a/src/sys/debug.c b/src/sys/debug.c
index 101d0b66..50598a66 100644
--- a/src/sys/debug.c
+++ b/src/sys/debug.c
@@ -239,4 +239,26 @@ const char *FileInformationClassSym(FILE_INFORMATION_CLASS FileInformationClass)
         return "FILE_INFORMATION_CLASS:Unknown";
     }
 }
+
+const char *FsInformationClassSym(FS_INFORMATION_CLASS FsInformationClass)
+{
+    switch (FsInformationClass)
+    {
+    SYM(FileFsVolumeInformation)
+    SYM(FileFsLabelInformation)
+    SYM(FileFsSizeInformation)
+    SYM(FileFsDeviceInformation)
+    SYM(FileFsAttributeInformation)
+    SYM(FileFsControlInformation)
+    SYM(FileFsFullSizeInformation)
+    SYM(FileFsObjectIdInformation)
+    SYM(FileFsDriverPathInformation)
+    SYM(FileFsVolumeFlagsInformation)
+    SYM(FileFsSectorSizeInformation)
+    SYM(FileFsDataCopyInformation)
+    SYM(FileFsMetadataSizeInformation)
+    default:
+        return "FS_INFORMATION_CLASS:Unknown";
+    }
+}
 #endif
diff --git a/src/sys/driver.h b/src/sys/driver.h
index 12bc3ca4..1e0aed55 100644
--- a/src/sys/driver.h
+++ b/src/sys/driver.h
@@ -618,6 +618,7 @@ const char *IrpMajorFunctionSym(UCHAR MajorFunction);
 const char *IrpMinorFunctionSym(UCHAR MajorFunction, UCHAR MinorFunction);
 const char *IoctlCodeSym(ULONG ControlCode);
 const char *FileInformationClassSym(FILE_INFORMATION_CLASS FileInformationClass);
+const char *FsInformationClassSym(FS_INFORMATION_CLASS FsInformationClass);
 static inline
 VOID FspDebugLogIrp(const char *func, PIRP Irp, NTSTATUS Result)
 {
diff --git a/src/sys/volinfo.c b/src/sys/volinfo.c
index 89da6a51..b56406dd 100644
--- a/src/sys/volinfo.c
+++ b/src/sys/volinfo.c
@@ -37,7 +37,8 @@ VOID FspFsvolQueryVolumeInformationComplete(
 {
     FSP_ENTER_IOC(PAGED_CODE());
 
-    FSP_LEAVE_IOC("%s", "");
+    FSP_LEAVE_IOC("%s",
+        FsInformationClassSym(IrpSp->Parameters.QueryVolume.FsInformationClass));
 }
 
 static NTSTATUS FspFsvolSetVolumeInformation(
@@ -53,7 +54,8 @@ VOID FspFsvolSetVolumeInformationComplete(
 {
     FSP_ENTER_IOC(PAGED_CODE());
 
-    FSP_LEAVE_IOC("%s", "");
+    FSP_LEAVE_IOC("%s",
+        FsInformationClassSym(IrpSp->Parameters.SetVolume.FsInformationClass));
 }
 
 NTSTATUS FspQueryVolumeInformation(
@@ -69,7 +71,8 @@ NTSTATUS FspQueryVolumeInformation(
         FSP_RETURN(Result = STATUS_INVALID_DEVICE_REQUEST);
     }
 
-    FSP_LEAVE_MJ("%s", "");
+    FSP_LEAVE_MJ("%s",
+        FsInformationClassSym(IrpSp->Parameters.QueryVolume.FsInformationClass));
 }
 
 NTSTATUS FspSetVolumeInformation(
@@ -85,5 +88,6 @@ NTSTATUS FspSetVolumeInformation(
         FSP_RETURN(Result = STATUS_INVALID_DEVICE_REQUEST);
     }
 
-    FSP_LEAVE_MJ("%s", "");
+    FSP_LEAVE_MJ("%s",
+        FsInformationClassSym(IrpSp->Parameters.SetVolume.FsInformationClass));
 }