diff --git a/graphql-spqr-spring-boot-autoconfigure/src/main/java/io/leangen/graphql/spqr/spring/web/GraphQLController.java b/graphql-spqr-spring-boot-autoconfigure/src/main/java/io/leangen/graphql/spqr/spring/web/GraphQLController.java
index f316e64..e941115 100644
--- a/graphql-spqr-spring-boot-autoconfigure/src/main/java/io/leangen/graphql/spqr/spring/web/GraphQLController.java
+++ b/graphql-spqr-spring-boot-autoconfigure/src/main/java/io/leangen/graphql/spqr/spring/web/GraphQLController.java
@@ -37,7 +37,7 @@ public Object executeJsonPost(@RequestBody GraphQLRequest requestBody,
                                 R request) {
         String query = requestParams.getQuery() == null ? requestBody.getQuery() : requestParams.getQuery();
         String operationName = requestParams.getOperationName() == null ? requestBody.getOperationName() : requestParams.getOperationName();
-        Map<String, Object> variables = requestParams.getVariables() == null ? requestBody.getVariables() : requestParams.getVariables();
+        Map<String, Object> variables = requestParams.getVariables().isEmpty() ? requestBody.getVariables() : requestParams.getVariables();
 
         return executor.execute(graphQL, new GraphQLRequest(query, operationName, variables), request);
     }