diff --git a/Source/cmCommandArgumentLexer.cxx b/Source/cmCommandArgumentLexer.cxx
index 88dc98a9f..4881171bc 100644
--- a/Source/cmCommandArgumentLexer.cxx
+++ b/Source/cmCommandArgumentLexer.cxx
@@ -1,3 +1,5 @@
+#include "cmStandardIncludes.h"
+
 #line 2 "cmCommandArgumentLexer.cxx"
 
 #line 4 "cmCommandArgumentLexer.cxx"
diff --git a/Source/cmCommandArgumentLexer.in.l b/Source/cmCommandArgumentLexer.in.l
index f5d025b0e..8425c0080 100644
--- a/Source/cmCommandArgumentLexer.in.l
+++ b/Source/cmCommandArgumentLexer.in.l
@@ -24,6 +24,7 @@ Run flex like this:
   flex --prefix=cmCommandArgument_yy --header-file=cmCommandArgumentLexer.h -ocmCommandArgumentLexer.cxx cmCommandArgumentLexer.in.l
 
 Modify cmCommandArgumentLexer.cxx:
+  - add #include "cmStandardIncludes.h" to top of file
   - remove TABs
   - remove "yyscanner" argument from these methods:
       yy_fatal_error, cmCommandArgument_yyalloc, cmCommandArgument_yyrealloc, cmCommandArgument_yyfree