diff --git a/Source/cmGlobalGenerator.cxx b/Source/cmGlobalGenerator.cxx
index e85d80e1c..3d2b60ec9 100644
--- a/Source/cmGlobalGenerator.cxx
+++ b/Source/cmGlobalGenerator.cxx
@@ -94,6 +94,7 @@ cmGlobalGenerator::cmGlobalGenerator(cmake* cm)
   this->TryCompileOuterMakefile = CM_NULLPTR;
 
   this->ConfigureDoneCMP0026AndCMP0024 = false;
+  this->FirstTimeProgress = 0.0f;
 
   cm->GetState()->SetMinGWMake(false);
   cm->GetState()->SetMSYSShell(false);