diff --git a/SMILEBASIC/VM.d b/SMILEBASIC/VM.d
index 18690e3..901bc4f 100644
--- a/SMILEBASIC/VM.d
+++ b/SMILEBASIC/VM.d
@@ -91,7 +91,7 @@ class PrintCode : Code
                     write(arg.stringValue);
                     break;
                 default:
-                    //type missmatch
+                    //type mismatch
                     break;
             }
         }
@@ -184,8 +184,8 @@ class Operate : Code
                         vm.push(Value(ls >= rs));
                         return;
                     default:
-                        //type missmatch
-                        stderr.writeln("Type missmatch");
+                        //type mismatch
+                        stderr.writeln("Type mismatch");
                         return;
                 }
             }
@@ -213,8 +213,8 @@ class Operate : Code
                         vm.push(Value(3));
                         return;
                     default:
-                        //type missmatch
-                        stderr.writeln("Type missmatch");
+                        //type mismatch
+                        stderr.writeln("Type mismatch");
                         return;
                 }
             }
diff --git a/SMILEBASIC/type.d b/SMILEBASIC/type.d
index 6d66939..fa86277 100644
--- a/SMILEBASIC/type.d
+++ b/SMILEBASIC/type.d
@@ -56,7 +56,7 @@ struct Value
             case ValueType.String:
                 return true;//3.1現在では文字列はtrue(ただし!"A"などは動かない)
             default:
-                //配列はtype missmatch
+                //配列はtype mismatch
                 return false;
         }
     }