diff --git a/Include/Python-ast.h b/Include/Python-ast.h
index 8fd8ceb..390b8ea 100644
--- a/Include/Python-ast.h
+++ b/Include/Python-ast.h
@@ -184,10 +184,10 @@
 };
 
 enum _expr_kind {BoolOp_kind=1, BinOp_kind=2, UnaryOp_kind=3, Lambda_kind=4,
-                  IfExp_kind=5, Dict_kind=6, ListComp_kind=7,
-                  GeneratorExp_kind=8, Yield_kind=9, Compare_kind=10,
-                  Call_kind=11, Num_kind=12, Str_kind=13, Attribute_kind=14,
-                  Subscript_kind=15, Name_kind=16, List_kind=17, Tuple_kind=18};
+                  IfExp_kind=5, Dict_kind=6, Set_kind=7, ListComp_kind=8,
+                  GeneratorExp_kind=9, Yield_kind=10, Compare_kind=11,
+                  Call_kind=12, Num_kind=13, Str_kind=14, Attribute_kind=15,
+                  Subscript_kind=16, Name_kind=17, List_kind=18, Tuple_kind=19};
 struct _expr {
         enum _expr_kind kind;
         union {
@@ -224,6 +224,10 @@
                 } Dict;
                 
                 struct {
+                        asdl_seq *elts;
+                } Set;
+                
+                struct {
                         expr_ty elt;
                         asdl_seq *generators;
                 } ListComp;
@@ -399,6 +403,7 @@
               col_offset, PyArena *arena);
 expr_ty Dict(asdl_seq * keys, asdl_seq * values, int lineno, int col_offset,
              PyArena *arena);
+expr_ty Set(asdl_seq * elts, int lineno, int col_offset, PyArena *arena);
 expr_ty ListComp(expr_ty elt, asdl_seq * generators, int lineno, int
                  col_offset, PyArena *arena);
 expr_ty GeneratorExp(expr_ty elt, asdl_seq * generators, int lineno, int
diff --git a/Include/graminit.h b/Include/graminit.h
index 9af182a..f4701a6 100644
--- a/Include/graminit.h
+++ b/Include/graminit.h
@@ -69,7 +69,7 @@
 #define sliceop 324
 #define exprlist 325
 #define testlist 326
-#define dictmaker 327
+#define dictsetmaker 327
 #define classdef 328
 #define arglist 329
 #define argument 330
diff --git a/Include/opcode.h b/Include/opcode.h
index 1b9cb5c..4c823d9 100644
--- a/Include/opcode.h
+++ b/Include/opcode.h
@@ -97,11 +97,12 @@
 #define LOAD_NAME	101	/* Index in name list */
 #define BUILD_TUPLE	102	/* Number of tuple items */
 #define BUILD_LIST	103	/* Number of list items */
-#define BUILD_MAP	104	/* Always zero for now */
-#define LOAD_ATTR	105	/* Index in name list */
-#define COMPARE_OP	106	/* Comparison operator */
-#define IMPORT_NAME	107	/* Index in name list */
-#define IMPORT_FROM	108	/* Index in name list */
+#define BUILD_SET	104     /* Number of set items */
+#define BUILD_MAP	105	/* Always zero for now */
+#define LOAD_ATTR	106	/* Index in name list */
+#define COMPARE_OP	107	/* Comparison operator */
+#define IMPORT_NAME	108	/* Index in name list */
+#define IMPORT_FROM	109	/* Index in name list */
 
 #define JUMP_FORWARD	110	/* Number of bytes to skip */
 #define JUMP_IF_FALSE	111	/* "" */