diff --git a/src/core/evaluator.js b/src/core/evaluator.js
index 5bccea9ae..1958a3520 100644
--- a/src/core/evaluator.js
+++ b/src/core/evaluator.js
@@ -1188,15 +1188,15 @@ class PartialEvaluator {
           break;
       }
     }
-    return promise.then(function () {
-      if (gStateObj.length > 0) {
-        operatorList.addOp(OPS.setGState, [gStateObj]);
-      }
+    await promise;
 
-      if (isSimpleGState) {
-        localGStateCache.set(cacheKey, gStateRef, gStateObj);
-      }
-    });
+    if (gStateObj.length > 0) {
+      operatorList.addOp(OPS.setGState, [gStateObj]);
+    }
+
+    if (isSimpleGState) {
+      localGStateCache.set(cacheKey, gStateRef, gStateObj);
+    }
   }
 
   loadFont(