diff --git a/inc/fuse/fuse_common.h b/inc/fuse/fuse_common.h
index 50fb65cd..c14e1c14 100644
--- a/inc/fuse/fuse_common.h
+++ b/inc/fuse/fuse_common.h
@@ -85,7 +85,7 @@ FSP_FUSE_API void fsp_fuse_unmount(struct fsp_fuse_env *env,
 FSP_FUSE_API int fsp_fuse_parse_cmdline(struct fsp_fuse_env *env,
     struct fuse_args *args,
     char **mountpoint, int *multithreaded, int *foreground);
-FSP_FUSE_API long fsp_fuse_ntstatus_from_errno(struct fsp_fuse_env *env,
+FSP_FUSE_API int32_t fsp_fuse_ntstatus_from_errno(struct fsp_fuse_env *env,
     int err);
 
 static inline int fuse_version(void)
diff --git a/src/dll/fuse/fuse.c b/src/dll/fuse/fuse.c
index 5cddf694..a0024f2a 100644
--- a/src/dll/fuse/fuse.c
+++ b/src/dll/fuse/fuse.c
@@ -639,7 +639,7 @@ FSP_FUSE_API struct fuse_context *fsp_fuse_get_context(struct fsp_fuse_env *rese
     return context;
 }
 
-FSP_FUSE_API NTSTATUS fsp_fuse_ntstatus_from_errno(struct fsp_fuse_env *env,
+FSP_FUSE_API int32_t fsp_fuse_ntstatus_from_errno(struct fsp_fuse_env *env,
     int err)
 {
     if (0 > err)