diff --git a/gen/toobj.cpp b/gen/toobj.cpp
index e92cd928..d00556ec 100644
--- a/gen/toobj.cpp
+++ b/gen/toobj.cpp
@@ -377,7 +377,6 @@ void assemble(const llvm::sys::Path& asmpath, const llvm::sys::Path& objpath)
         error("failed to invoke gcc");
         fatal();
     }
-    delete [] clean_env;
 }