diff --git a/src/libxrpl/tx/invariants/InvariantCheck.cpp b/src/libxrpl/tx/invariants/InvariantCheck.cpp
index a151a4a0ca..c567adf73f 100644
--- a/src/libxrpl/tx/invariants/InvariantCheck.cpp
+++ b/src/libxrpl/tx/invariants/InvariantCheck.cpp
@@ -1004,7 +1004,7 @@ hasConstantFieldChanged(STObject const& before, STObject const& after, SOTemplat
             constant != SoeImmutable, "xrpl::hasConstantFieldChanged : constant is invalid");
         if (constant == SoeImmutable)
         {
-            if (elem.style() == soeOPTIONAL)
+            if (elem.style() == SoeOptional)
             {
                 // Optional constant fields may be added or removed,
                 // but their value must not change once present.
@@ -1020,7 +1020,7 @@ hasConstantFieldChanged(STObject const& before, STObject const& after, SOTemplat
                     return true;
             }
         }
-        // soeNOTCONSTANT fields may change freely — no recursion
+        // SoeMutable fields may change freely — no recursion
         // into inner objects/arrays is needed because the parent
         // field explicitly allows changes to its entire contents.
     }
diff --git a/src/test/app/Invariants_test.cpp b/src/test/app/Invariants_test.cpp
index 88f31c1f64..016e539dc1 100644
--- a/src/test/app/Invariants_test.cpp
+++ b/src/test/app/Invariants_test.cpp
@@ -2138,7 +2138,7 @@ class Invariants_test : public beast::unit_test::Suite
             }
         }
 
-        // Template-based checks: soeNOTCONSTANT field
+        // Template-based checks: SoeMutable field
         // (sfPreviousTxnID) on AccountRoot should NOT fail when
         // modified — no invariant checks this field.
         {
@@ -2181,7 +2181,7 @@ class Invariants_test : public beast::unit_test::Suite
             }
         }
 
-        // Without featureInvariantsV1_1, modifying a soeCONSTANT field
+        // Without featureInvariantsV1_1, modifying a SoeImmutable field
         // that is NOT sfLedgerEntryType/sfLedgerIndex on a non-loan
         // type should NOT fail (old code doesn't check it)
         {