diff --git a/Tools/scripts/generate_token.py b/Tools/scripts/generate_token.py
index f2745e8..77bb5bd 100755
--- a/Tools/scripts/generate_token.py
+++ b/Tools/scripts/generate_token.py
@@ -69,6 +69,10 @@
 #define ISTERMINAL(x)           ((x) < NT_OFFSET)
 #define ISNONTERMINAL(x)        ((x) >= NT_OFFSET)
 #define ISEOF(x)                ((x) == ENDMARKER)
+#define ISWHITESPACE(x)         ((x) == ENDMARKER || \\
+                                 (x) == NEWLINE   || \\
+                                 (x) == INDENT    || \\
+                                 (x) == DEDENT)
 
 
 PyAPI_DATA(const char * const) _PyParser_TokenNames[]; /* Token names */