diff --git a/src/main/java/com/google/api/generator/gapic/protoparser/HttpRuleParser.java b/src/main/java/com/google/api/generator/gapic/protoparser/HttpRuleParser.java
index cd2ae640c9..10c9b1b071 100644
--- a/src/main/java/com/google/api/generator/gapic/protoparser/HttpRuleParser.java
+++ b/src/main/java/com/google/api/generator/gapic/protoparser/HttpRuleParser.java
@@ -148,7 +148,7 @@ private static void checkHttpFieldIsValid(String binding, Message inputMessage,
     Field field = inputMessage.fieldMap().get(binding);
     boolean fieldCondition = !field.isRepeated();
     if (!isBody) {
-      fieldCondition &= field.type().isProtoPrimitiveType();
+      fieldCondition &= field.type().isProtoPrimitiveType() || field.isEnum();
     }
     String messageFormat =
         "Expected a non-repeated "