diff --git a/lib/contracts/contracts.js b/lib/contracts/contracts.js
index f075a485f..09cafcc3d 100644
--- a/lib/contracts/contracts.js
+++ b/lib/contracts/contracts.js
@@ -100,7 +100,7 @@ class ContractsManager {
 
           if (parentContract === undefined) {
             self.logger.error(className + ": couldn't find instanceOf contract " + parentContractName);
-            let suggestion = utils.proposeAlternative(className, dictionary, [className, parentContractName]);
+            let suggestion = utils.proposeAlternative(parentContractName, dictionary, [className, parentContractName]);
             if (suggestion) {
               self.logger.warn('did you mean "' + suggestion + '"?');
             }