diff --git a/internal/codegen/codegen.go b/internal/codegen/codegen.go
index c0e354e5..5eed7494 100644
--- a/internal/codegen/codegen.go
+++ b/internal/codegen/codegen.go
@@ -1526,7 +1526,7 @@ func emitRangeMap(meta *ir.MetaForContainer) {
 	emitComment(2, "ForRangeStmt map Initialization\n")
 
 	// _mp = EXPRs
-	_emitSingleAssign(meta.ForRangeStmt.MapVar, meta.ForRangeStmt.X)
+	emitSingleAssign(meta.ForRangeStmt.MapVarAssign)
 
 	//  if _mp == nil then exit
 	emitVariable(meta.ForRangeStmt.MapVar) // value of _mp
diff --git a/internal/ir/ir.go b/internal/ir/ir.go
index 077021b6..9f372f5b 100644
--- a/internal/ir/ir.go
+++ b/internal/ir/ir.go
@@ -125,15 +125,16 @@ type MetaForForStmt struct {
 }
 
 type MetaForRangeStmt struct {
-	Tpos     token.Pos
-	IsMap    bool
-	LenVar   *Variable
-	Indexvar *Variable
-	MapVar   *Variable // map
-	ItemVar  *Variable // map element
-	X        MetaExpr
-	Key      MetaExpr
-	Value    MetaExpr
+	Tpos         token.Pos
+	IsMap        bool
+	LenVar       *Variable
+	Indexvar     *Variable
+	MapVar       *Variable // map
+	ItemVar      *Variable // map element
+	X            MetaExpr
+	Key          MetaExpr
+	Value        MetaExpr
+	MapVarAssign *MetaSingleAssign
 }
 
 type MetaBranchStmt struct {
diff --git a/internal/sema/sema.go b/internal/sema/sema.go
index 2742ca92..4f75bc98 100644
--- a/internal/sema/sema.go
+++ b/internal/sema/sema.go
@@ -1004,12 +1004,18 @@ func walkRangeStmt(s *ast.RangeStmt) *ir.MetaForContainer {
 			X:        metaX,
 		}
 	case types.T_MAP:
+		mapVar := registerLocalVariable(currentFunc, ".range.map", types.Uintptr)
+		mapVarAssign := &ir.MetaSingleAssign{
+			Tpos: s.Pos(),
+			Lhs:  mapVar,
+			Rhs:  metaX,
+		}
 		meta.ForRangeStmt = &ir.MetaForRangeStmt{
-			Tpos:    s.Pos(),
-			IsMap:   true,
-			MapVar:  registerLocalVariable(currentFunc, ".range.map", types.Uintptr),
-			ItemVar: registerLocalVariable(currentFunc, ".range.item", types.Uintptr),
-			X:       metaX,
+			Tpos:         s.Pos(),
+			IsMap:        true,
+			MapVar:       mapVar,
+			ItemVar:      registerLocalVariable(currentFunc, ".range.item", types.Uintptr),
+			MapVarAssign: mapVarAssign,
 		}
 	default:
 		throw(collectionType)