diff --git a/Source/cmGlobalUnixMakefileGenerator3.cxx b/Source/cmGlobalUnixMakefileGenerator3.cxx
index 805545acb..13bf515d3 100644
--- a/Source/cmGlobalUnixMakefileGenerator3.cxx
+++ b/Source/cmGlobalUnixMakefileGenerator3.cxx
@@ -173,8 +173,9 @@ GetNumberOfCompilableSourceFilesForTarget(cmTarget &tgt)
 //----------------------------------------------------------------------------
 void cmGlobalUnixMakefileGenerator3::Generate() 
 {
-  // initialize progress
-  this->NumberOfSourceFiles = 0;
+  // initialize progress, always pretend there is at least 1 file
+  // to avoid division errors etc
+  this->NumberOfSourceFiles = 1;
   unsigned int i;
   for (i = 0; i < this->LocalGenerators.size(); ++i)
     {
@@ -709,7 +710,7 @@ cmGlobalUnixMakefileGenerator3
                                  cmLocalGenerator::SHELL);
           progCmd << " " <<
             (100*this->GetTargetTotalNumberOfSourceFiles(t->second))/
-            this->GetNumberOfSourceFiles();
+            this->NumberOfSourceFiles;
           commands.push_back(progCmd.str());
           commands.push_back(lg->GetRecursiveMakeCall
                              ("CMakeFiles/Makefile2",t->second.GetName()));
diff --git a/Source/cmGlobalUnixMakefileGenerator3.h b/Source/cmGlobalUnixMakefileGenerator3.h
index 1cce9a8fa..90e3be1df 100644
--- a/Source/cmGlobalUnixMakefileGenerator3.h
+++ b/Source/cmGlobalUnixMakefileGenerator3.h
@@ -125,7 +125,6 @@ public:
 
   // returns true if a progress rule should be added
   int ShouldAddProgressRule();
-  int GetNumberOfSourceFiles() {return this->NumberOfSourceFiles; }
   int GetNumberOfCompilableSourceFilesForTarget(cmTarget &tgt);
   int GetTargetTotalNumberOfSourceFiles(cmTarget& target);
   
@@ -183,8 +182,8 @@ protected:
   typedef std::map<cmStdString, cmStdString> MultipleOutputPairsType;
   MultipleOutputPairsType MultipleOutputPairs;
 
-  size_t NumberOfSourceFiles;
-  size_t NumberOfSourceFilesWritten;
+  int NumberOfSourceFiles;
+  int NumberOfSourceFilesWritten;
 
   std::map<cmStdString, std::vector<cmTarget *> > TargetDependencies;
   std::map<cmStdString, int > TargetSourceFileCount;