diff --git a/source/fuzz/fuzzer_pass_copy_objects.cpp b/source/fuzz/fuzzer_pass_copy_objects.cpp
index 81326ac7f..4cc4044fe 100644
--- a/source/fuzz/fuzzer_pass_copy_objects.cpp
+++ b/source/fuzz/fuzzer_pass_copy_objects.cpp
@@ -54,13 +54,13 @@ void FuzzerPassCopyObjects::Apply() {
           return;
         }
 
-        std::vector<opt::Instruction*> relevant_instructions =
-            FindAvailableInstructions(
-                function, block, inst_it,
-                [this](opt::IRContext* ir_context, opt::Instruction* inst) {
-                  return fuzzerutil::CanMakeSynonymOf(
-                      ir_context, *GetTransformationContext(), inst);
-                });
+        const auto relevant_instructions = FindAvailableInstructions(
+            function, block, inst_it,
+            [this](opt::IRContext* ir_context, opt::Instruction* inst) {
+              return TransformationAddSynonym::IsInstructionValid(
+                  ir_context, *GetTransformationContext(), inst,
+                  protobufs::TransformationAddSynonym::COPY_OBJECT);
+            });
 
         // At this point, |relevant_instructions| contains all the instructions
         // we might think of copying.