diff --git a/Source/cmFLTKWrapUICommand.cxx b/Source/cmFLTKWrapUICommand.cxx
index 6d6474b3d..aa098d955 100644
--- a/Source/cmFLTKWrapUICommand.cxx
+++ b/Source/cmFLTKWrapUICommand.cxx
@@ -19,7 +19,7 @@
 // cmFLTKWrapUICommand
 bool cmFLTKWrapUICommand::InitialPass(std::vector<std::string> const& args)
 {
-  if(args.size() != 2 )
+  if(args.size() < 2 )
     {
     this->SetError("called with incorrect number of arguments");
     return false;