diff --git a/src/services/jsDoc.ts b/src/services/jsDoc.ts
index bb90a601a49..0d166459d98 100644
--- a/src/services/jsDoc.ts
+++ b/src/services/jsDoc.ts
@@ -360,7 +360,7 @@ namespace ts.JsDoc {
                     const varStatement = <VariableStatement>commentOwner;
                     const varDeclarations = varStatement.declarationList.declarations;
                     const parameters = varDeclarations.length === 1 && varDeclarations[0].initializer
-                        ? getParametersFromRightHandSideOfAssignment(varDeclarations[0].initializer!)
+                        ? getParametersFromRightHandSideOfAssignment(varDeclarations[0].initializer)
                         : undefined;
                     return { commentOwner, parameters };
                 }