diff --git a/arch/sim/src/nuttx-names.dat b/arch/sim/src/nuttx-names.dat
index 1f29147dc2c..5784beb8707 100644
--- a/arch/sim/src/nuttx-names.dat
+++ b/arch/sim/src/nuttx-names.dat
@@ -24,6 +24,7 @@ fread          NXfread
 fseek          NXfseek
 fwrite         NXfwrite
 fsync          NXfsync
+fstat          NXfstat
 ftell          NXftell
 getenv         NXgetenv
 getopt         NXgetopt
diff --git a/fs/fat/fs_fat32.c b/fs/fat/fs_fat32.c
index 806de2f4f6f..78df1f1024d 100644
--- a/fs/fat/fs_fat32.c
+++ b/fs/fat/fs_fat32.c
@@ -1634,7 +1634,7 @@ static int fat_fstat(FAR const struct file *filep, FAR struct stat *buf)
 
   /* Sanity checks */
 
-  DEBUGASSERT(filep->f_priv == NULL && filep->f_inode != NULL);
+  DEBUGASSERT(filep->f_priv != NULL && filep->f_inode != NULL);
 
   /* Get the mountpoint inode reference from the file structure and the
    * mountpoint private data from the inode structure
diff --git a/fs/romfs/fs_romfs.c b/fs/romfs/fs_romfs.c
index 9c1a7311d9a..354c603b706 100644
--- a/fs/romfs/fs_romfs.c
+++ b/fs/romfs/fs_romfs.c
@@ -719,7 +719,7 @@ static int romfs_fstat(FAR const struct file *filep, FAR struct stat *buf)
 
   /* Sanity checks */
 
-  DEBUGASSERT(filep->f_priv == NULL && filep->f_inode != NULL);
+  DEBUGASSERT(filep->f_priv != NULL && filep->f_inode != NULL);
 
   /* Get mountpoint private data from the inode reference from the file
    * structure