diff --git a/compiler/optimizing/optimizing_compiler.cc b/compiler/optimizing/optimizing_compiler.cc
index 9a580d1..795c367 100644
--- a/compiler/optimizing/optimizing_compiler.cc
+++ b/compiler/optimizing/optimizing_compiler.cc
@@ -652,7 +652,7 @@
     std::vector<OptimizationDef> optimizations;
     for (const std::string& pass_name : *pass_names) {
       std::string opt_name = ConvertPassNameToOptimizationName(pass_name);
-      optimizations.push_back(OptDef(OptimizationPassByName(opt_name.c_str()), pass_name.c_str()));
+      optimizations.push_back(OptDef(OptimizationPassByName(opt_name), pass_name.c_str()));
     }
     RunOptimizations(graph,
                      codegen,