diff --git a/Source/cmSystemTools.h b/Source/cmSystemTools.h
index f5be26b954..ec539292a8 100644
--- a/Source/cmSystemTools.h
+++ b/Source/cmSystemTools.h
@@ -274,7 +274,7 @@ public:
   static bool GetRunCommandOutput() { return s_DisableRunCommandOutput; }
 
   /**
-   * Come constants for different file formats.
+   * Some constants for different file formats.
    */
   enum FileFormat {
     NO_FILE_FORMAT = 0,