diff --git a/sim/mcuboot-sys/Cargo.toml b/sim/mcuboot-sys/Cargo.toml
index 79a2663..37dba5e 100644
--- a/sim/mcuboot-sys/Cargo.toml
+++ b/sim/mcuboot-sys/Cargo.toml
@@ -21,16 +21,16 @@
 # Overwrite only upgrade
 overwrite-only = []
 
-# Disable validation of slot0
-validate-slot0 = []
+# Disable validation of the primary slot
+validate-primary-slot = []
 
-# Encrypt image in slot1 using RSA-OAEP-2048
+# Encrypt image in the secondary slot using RSA-OAEP-2048
 enc-rsa = []
 
-# Encrypt image in slot1 using AES-KW-128
+# Encrypt image in the secondary slot using AES-KW-128
 enc-kw = []
 
-# Allow bootstrapping an empty/invalid slot0 from a valid slot1
+# Allow bootstrapping an empty/invalid primary slot from a valid secondary slot
 bootstrap = []
 
 [build-dependencies]