diff --git a/Source/cmTryCompileCommand.cxx b/Source/cmTryCompileCommand.cxx
index 47c3bd4e7..e20ad7ecf 100644
--- a/Source/cmTryCompileCommand.cxx
+++ b/Source/cmTryCompileCommand.cxx
@@ -154,7 +154,7 @@ int cmTryCompileCommand::CoreTryCompileCode(
       }
     else if ( format == cmSystemTools::CXX_FILE_FORMAT )
       {
-      fprintf(fout, "PROJECT(CMAKE_TRY_COMPILE CXX)\n");      
+      fprintf(fout, "PROJECT(CMAKE_TRY_COMPILE C CXX)\n");      
       }
     else if ( format == cmSystemTools::FORTRAN_FILE_FORMAT )
       {