diff --git a/Source/cmUnixMakefileGenerator.cxx b/Source/cmUnixMakefileGenerator.cxx
index 52bd79a8e..f41973b11 100644
--- a/Source/cmUnixMakefileGenerator.cxx
+++ b/Source/cmUnixMakefileGenerator.cxx
@@ -1210,7 +1210,8 @@ void cmUnixMakefileGenerator::OutputMakeVariables(std::ostream& fout)
     "\n"
     "\n";
   std::string replaceVars = variables;
-  
+  fout << ".SUFFIXES: .cxx .c .cpp .m \n";
+
   m_Makefile->ExpandVariablesInString(replaceVars);
   fout << replaceVars.c_str();
   fout << "CMAKE_CURRENT_SOURCE = " <<