diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index f902cb3b13a..a4c3a65f29c 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -87,6 +87,11 @@ module ts {
 
     export function getPreEmitDiagnostics(program: Program): Diagnostic[] {
         let diagnostics = program.getSyntacticDiagnostics().concat(program.getGlobalDiagnostics()).concat(program.getSemanticDiagnostics());
+
+        if (program.getCompilerOptions().declaration) {
+            diagnostics.concat(program.getDeclarationDiagnostics());
+        }
+
         return sortAndDeduplicateDiagnostics(diagnostics);
     }