diff --git a/src/fs/ntapi_tt_istat.c b/src/fs/ntapi_tt_istat.c
index 5e6df3d..f17c8b1 100644
--- a/src/fs/ntapi_tt_istat.c
+++ b/src/fs/ntapi_tt_istat.c
@@ -37,7 +37,7 @@ int32_t __stdcall __ntapi_tt_istat(
 		istat,0,sizeof(*istat));
 
 	istat->hfile           = hfile;
-	istat->dev_name_maxlen = infolen - sizeof(*istat);
+	istat->dev_name_maxlen = (uint16_t)infolen - sizeof(*istat);
 
 	/* file index number */
 	if (!(flags & NT_ISTAT_DEV_NAME_ONLY))
diff --git a/src/fs/ntapi_tt_stat.c b/src/fs/ntapi_tt_stat.c
index 4937067..762535f 100644
--- a/src/fs/ntapi_tt_stat.c
+++ b/src/fs/ntapi_tt_stat.c
@@ -37,7 +37,7 @@ int32_t __stdcall __ntapi_tt_stat(
 		stat,0,sizeof(*stat));
 
         stat->hfile           = hfile;
-        stat->dev_name_maxlen = infolen - sizeof(*stat);
+        stat->dev_name_maxlen = (uint16_t)infolen - sizeof(*stat);
 
 	/* system-unique device name */
 	if ((status = __ntapi->zw_query_information_file(
diff --git a/src/fs/ntapi_tt_statfs.c b/src/fs/ntapi_tt_statfs.c
index 21785fd..d131758 100644
--- a/src/fs/ntapi_tt_statfs.c
+++ b/src/fs/ntapi_tt_statfs.c
@@ -42,7 +42,7 @@ int32_t __stdcall __ntapi_tt_statfs(
 		statfs,0,sizeof(*statfs));
 
 	statfs->hfile           = hfile;
-	statfs->dev_name_maxlen = infolen - sizeof(*statfs);
+	statfs->dev_name_maxlen = (uint16_t)infolen - sizeof(*statfs);
 
 	/* maximum component length, file system type */
 	if ((status = __ntapi->zw_query_volume_information_file(