diff --git a/scripts/lib/wic/partition.py b/scripts/lib/wic/partition.py
index 85f9847047..76d144d12d 100644
--- a/scripts/lib/wic/partition.py
+++ b/scripts/lib/wic/partition.py
@@ -339,8 +339,6 @@ class Partition():
             label_str = "-n %s" % self.label
 
         size_str = ""
-        if self.fstype == 'msdos':
-            size_str = "-F 16" # FAT 16
 
         extraopts = self.mkfs_extraopts or '-S 512'
 
@@ -422,8 +420,6 @@ class Partition():
             label_str = "-n %s" % self.label
 
         size_str = ""
-        if self.fstype == 'msdos':
-            size_str = "-F 16" # FAT 16
 
         extraopts = self.mkfs_extraopts or '-S 512'