diff --git a/scripts/imgtool.py b/scripts/imgtool.py
index 2937331..dbb3334 100755
--- a/scripts/imgtool.py
+++ b/scripts/imgtool.py
@@ -158,8 +158,7 @@
             raise Exception("Encryption only available with RSA")
         if key and not isinstance(key, (keys.RSA2048, keys.RSA2048Public)):
             raise Exception("Encryption with sign only available with RSA")
-    if key or enckey:
-        img.create(key, enckey)
+    img.create(key, enckey)
 
     if pad:
         img.pad_to(slot_size)