diff --git a/src/tools/qtgrpcgen/qgrpcgenerator.cpp b/src/tools/qtgrpcgen/qgrpcgenerator.cpp
index ace0b684..bf90e525 100644
--- a/src/tools/qtgrpcgen/qgrpcgenerator.cpp
+++ b/src/tools/qtgrpcgen/qgrpcgenerator.cpp
@@ -30,13 +30,9 @@ QGrpcGenerator::~QGrpcGenerator() = default;
 bool QGrpcGenerator::Generate(const FileDescriptor *file,
                               [[maybe_unused]] const std::string &parameter,
                               GeneratorContext *generatorContext,
-                              std::string *error) const
+                              [[maybe_unused]] std::string *error) const
 {
     assert(file != nullptr && generatorContext != nullptr);
-    if (file->syntax() != FileDescriptor::SYNTAX_PROTO3) {
-        *error = "Invalid proto used. qtgrpcgen only supports 'proto3' syntax";
-        return false;
-    }
 
     return GenerateClientServices(file, generatorContext);
 }
diff --git a/src/tools/qtprotobufgen/qprotobufgenerator.cpp b/src/tools/qtprotobufgen/qprotobufgenerator.cpp
index 9c1e168c..b136fe33 100644
--- a/src/tools/qtprotobufgen/qprotobufgenerator.cpp
+++ b/src/tools/qtprotobufgen/qprotobufgenerator.cpp
@@ -36,16 +36,11 @@ QProtobufGenerator::~QProtobufGenerator() = default;
 bool QProtobufGenerator::Generate(const FileDescriptor *file,
                                   [[maybe_unused]] const std::string &parameter,
                                   GeneratorContext *generatorContext,
-                                  std::string *error) const
+                                  [[maybe_unused]] std::string *error) const
 {
     assert(file != nullptr);
     assert(generatorContext != nullptr);
 
-    if (file->syntax() != FileDescriptor::SYNTAX_PROTO3) {
-        *error = "Invalid proto used. qtprotobufgen only supports 'proto3' syntax";
-        return false;
-    }
-
     return GenerateMessages(file, generatorContext);
 }