diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index c2a1e6ade66..dbcb9f7c617 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -1003,7 +1003,7 @@ namespace ts {
             }
 
             const category = DiagnosticCategory[diagnostic.category].toLowerCase();
-            output += `${ category } TS${ diagnostic.code }: ${ flattenDiagnosticMessageText(diagnostic.messageText, sys.newLine) }${ sys.newLine }`;
+            output += `${ category } TS${ diagnostic.code }: ${ flattenDiagnosticMessageText(diagnostic.messageText, host.getNewLine()) }${ host.getNewLine() }`;
         }
         return output;
     }