diff --git a/Modules/sre_constants.h b/Modules/sre_constants.h
index 6b940d3..c6b123e 100644
--- a/Modules/sre_constants.h
+++ b/Modules/sre_constants.h
@@ -1,4 +1,4 @@
-/* generated by sre_constants.py */
+/* generated from sre_constants.py */
 #define SRE_OP_FAILURE 0
 #define SRE_OP_SUCCESS 1
 #define SRE_OP_ANY 2
@@ -25,3 +25,25 @@
 #define SRE_OP_NEGATE 23
 #define SRE_OP_RANGE 24
 #define SRE_OP_REPEAT 25
+#define SRE_AT_BEGINNING 0
+#define SRE_AT_BEGINNING_LINE 1
+#define SRE_AT_BOUNDARY 2
+#define SRE_AT_NON_BOUNDARY 3
+#define SRE_AT_END 4
+#define SRE_AT_END_LINE 5
+#define SRE_CATEGORY_DIGIT 0
+#define SRE_CATEGORY_NOT_DIGIT 1
+#define SRE_CATEGORY_SPACE 2
+#define SRE_CATEGORY_NOT_SPACE 3
+#define SRE_CATEGORY_WORD 4
+#define SRE_CATEGORY_NOT_WORD 5
+#define SRE_CATEGORY_LINEBREAK 6
+#define SRE_CATEGORY_NOT_LINEBREAK 7
+#define SRE_CATEGORY_LOC_DIGIT 8
+#define SRE_CATEGORY_LOC_NOT_DIGIT 9
+#define SRE_CATEGORY_LOC_SPACE 10
+#define SRE_CATEGORY_LOC_NOT_SPACE 11
+#define SRE_CATEGORY_LOC_WORD 12
+#define SRE_CATEGORY_LOC_NOT_WORD 13
+#define SRE_CATEGORY_LOC_LINEBREAK 14
+#define SRE_CATEGORY_LOC_NOT_LINEBREAK 15