diff --git a/src/insts/annotation.cpp b/src/insts/annotation.cpp
index 81c9c9b..ab23013 100644
--- a/src/insts/annotation.cpp
+++ b/src/insts/annotation.cpp
@@ -14,7 +14,7 @@ Ref Module::Decorate(Ref target, spv::Decoration decoration,
     auto const op{new Op(spv::Op::OpDecorate)};
     op->Add(target);
     AddEnum(op, decoration);
-    op->Add(literals);
+    op->Sink(literals);
     return AddAnnotation(op);
 }
 
diff --git a/src/op.cpp b/src/op.cpp
index 68dbe33..a6afe51 100644
--- a/src/op.cpp
+++ b/src/op.cpp
@@ -65,11 +65,17 @@ void Op::Sink(Operand* operand) {
     operand_store.push_back(std::unique_ptr<Operand>(operand));
 }
 
+void Op::Sink(const std::vector<Operand*>& operands) {
+    for (Operand* operand : operands) {
+        Sink(operand);
+    }
+}
+
 void Op::Add(const Operand* operand) { operands.push_back(operand); }
 
-void Op::Add(u32 integer) { Add(LiteralNumber::Create<u32>(integer)); }
+void Op::Add(u32 integer) { Sink(LiteralNumber::Create<u32>(integer)); }
 
-void Op::Add(const std::string& string) { Add(new LiteralString(string)); }
+void Op::Add(const std::string& string) { Sink(new LiteralString(string)); }
 
 void Op::Add(const std::vector<Ref>& ids) {
     for (Ref op : ids) {
@@ -77,12 +83,6 @@ void Op::Add(const std::vector<Ref>& ids) {
     }
 }
 
-void Op::Add(const std::vector<Operand*>& operands) {
-    for (Operand* operand : operands) {
-        Add(operand);
-    }
-}
-
 u16 Op::WordCount() const {
     u16 count{1};
     if (result_type) {
diff --git a/src/op.h b/src/op.h
index 7111721..87e51c1 100644
--- a/src/op.h
+++ b/src/op.h
@@ -29,6 +29,8 @@ class Op : public Operand {
 
     void Sink(Operand* operand);
 
+    void Sink(const std::vector<Operand*>& operands);
+
     void Add(const Operand* operand);
 
     void Add(u32 integer);
@@ -37,8 +39,6 @@ class Op : public Operand {
 
     void Add(const std::vector<Ref>& ids);
 
-    void Add(const std::vector<Operand*>& operands);
-
   private:
     u16 WordCount() const;