diff --git a/Source/cmDocumentation.cxx b/Source/cmDocumentation.cxx
index 356d7f35a..50a733ff0 100644
--- a/Source/cmDocumentation.cxx
+++ b/Source/cmDocumentation.cxx
@@ -343,8 +343,8 @@ void cmDocumentation::ClearSections()
 //----------------------------------------------------------------------------
 void cmDocumentation::AddDocumentIntroToPrint(const char* intro[2])
 {
-  const char* docname;
-  if (intro && (docname = this->GetDocName(false)))
+  const char* docname = this->GetDocName(false);
+  if(intro && docname)
     {
     cmDocumentationSection* section;
     std::string desc("");