diff --git a/include/verilated.cpp b/include/verilated.cpp
index 81d4290e7..d42cc43d6 100644
--- a/include/verilated.cpp
+++ b/include/verilated.cpp
@@ -3476,7 +3476,7 @@ void VerilatedHierarchy::remove(VerilatedScope* fromp, VerilatedScope* top) {
 void VerilatedAssertOneThread::fatal_different() VL_MT_SAFE {
     VL_FATAL_MT(__FILE__, __LINE__, "",
                 "Routine called that is single threaded, but called from"
-                " a different thread then the expected constructing thread");
+                " a different thread than the expected constructing thread");
 }
 #endif
 
diff --git a/src/V3Width.cpp b/src/V3Width.cpp
index 43b0715eb..108f2de02 100644
--- a/src/V3Width.cpp
+++ b/src/V3Width.cpp
@@ -4328,7 +4328,7 @@ class WidthVisitor final : public VNVisitor {
         userIterateChildren(nodep, WidthVP{SELF, BOTH}.p());
         if (!similarDTypeRecurse(nodep->dtypep(), nodep->rhsp()->dtypep())) {
             nodep->rhsp()->v3error("New-as-copier passed different data type '"
-                                   << nodep->dtypep()->prettyTypeName() << "' then expected '"
+                                   << nodep->dtypep()->prettyTypeName() << "' than expected '"
                                    << nodep->rhsp()->dtypep()->prettyTypeName() << "'");
         }
     }
diff --git a/test_regress/t/t_class_copy_bad.out b/test_regress/t/t_class_copy_bad.out
index de65e77eb..62187f6b1 100644
--- a/test_regress/t/t_class_copy_bad.out
+++ b/test_regress/t/t_class_copy_bad.out
@@ -1,4 +1,4 @@
-%Error: t/t_class_copy_bad.v:19:16: New-as-copier passed different data type 'CLASSREFDTYPE 'Cls'' then expected 'CLASSREFDTYPE 'Other''
+%Error: t/t_class_copy_bad.v:19:16: New-as-copier passed different data type 'CLASSREFDTYPE 'Cls'' than expected 'CLASSREFDTYPE 'Other''
                                   : ... note: In instance 't'
    19 |       c1 = new co;   
       |                ^~