diff --git a/packages/apollo-link-state/src/index.ts b/packages/apollo-link-state/src/index.ts
index 01acef4..27ecd4d 100644
--- a/packages/apollo-link-state/src/index.ts
+++ b/packages/apollo-link-state/src/index.ts
@@ -87,8 +87,10 @@ export const withClientState = (
         const aliasNeeded = resultKey !== fieldName;
 
         // If aliasedValue is defined, some other link or server already returned a value
-        if (aliasedNode !== undefined || preAliasingNode !== undefined) {
-          return aliasedNode || preAliasingNode;
+        if (aliasedNode !== undefined) {
+          return aliasedNode;
+        } else if (preAliasingNode !== undefined) {
+          return preAliasingNode;
         }
 
         // Look for the field in the custom resolver map