diff --git a/src/main/java/graphql/GraphqlErrorHelper.java b/src/main/java/graphql/GraphqlErrorHelper.java
index 391b223d92..901c25b5a9 100644
--- a/src/main/java/graphql/GraphqlErrorHelper.java
+++ b/src/main/java/graphql/GraphqlErrorHelper.java
@@ -73,7 +73,10 @@ public static Object location(SourceLocation location) {
         if (line < 1 || column < 1) {
             return null;
         }
-        return Map.of("line", line, "column", column);
+        LinkedHashMap<String, Object> map = new LinkedHashMap<>(2);
+        map.put("line", line);
+        map.put("column", column);
+        return map;
     }
 
     static List<GraphQLError> fromSpecification(List<Map<String, Object>> specificationMaps) {
diff --git a/src/test/groovy/graphql/GraphqlErrorHelperTest.groovy b/src/test/groovy/graphql/GraphqlErrorHelperTest.groovy
index 018c9f1577..0736b1671a 100644
--- a/src/test/groovy/graphql/GraphqlErrorHelperTest.groovy
+++ b/src/test/groovy/graphql/GraphqlErrorHelperTest.groovy
@@ -3,6 +3,7 @@ package graphql
 import graphql.language.SourceLocation
 import graphql.validation.ValidationError
 import graphql.validation.ValidationErrorType
+import spock.lang.RepeatUntilFailure
 import spock.lang.Specification
 
 class GraphqlErrorHelperTest extends Specification {
@@ -154,4 +155,15 @@ class GraphqlErrorHelperTest extends Specification {
             assert gErr.getExtensions() == null
         }
     }
+
+    @RepeatUntilFailure(maxAttempts = 1_000)
+    def "can deterministically serialize SourceLocation"() {
+        when:
+        def specMap = GraphqlErrorHelper.toSpecification(new TestError())
+
+        then:
+        def location = specMap["locations"][0] as Map<String, Object>
+        def keys = location.keySet().toList()
+        keys == ["line", "column"]
+    }
 }