diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 032c5dc847b..eceaff3df6d 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -1009,7 +1009,7 @@ 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;
     }